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NEW ORLEANS (AP) -- Gunfire wounded four people on New Orleans' famed Bourbon Street as a costumed crowd partied amid the countdown to Mardi Gras, sending people running, police and bystanders said. Four shots rang out rapidly Saturday night, followed by screams as some in the crowd staggered into one another and a nearby wall, video taken by a bystander and released by police showed. Authorities said in an email Sunday that an argument involving one of the victims led to the shooting. They described the video - released early Sunday - as showing two men leaving the argument and returning with a third before the gunfire erupted. No arrests were immediately reported, and police said they were seeking the three men who fled. The wounded were two males and two females, New Orleans Police spokesman Frank B. Robertson said. One male victim was in guarded condition Sunday with shots to the abdomen, thigh and pelvis, Robertson said. The second male was shot in the buttocks, one female was shot on the chin and right foot, and the second female was shot on the toe, according to Robertson's statement. Police had said late Saturday that the most severely wounded man was undergoing surgery while the others were stable. None was identified by age or name. The shooting came on the last weekend of partying before Mardi Gras, the Fat Tuesday celebration that is the signature tourist event of the year in New Orleans. And for thousands, the partying continued despite the shooting. New Orleans has been plagued for years by violent crime, including gun violence that has soared since Hurricane Katrina devastated the city in 2005. In 2011, sixteen people were shot and at least two killed in Halloween shootings in New Orleans. One of those killed - a 25-year-old local resident - was shot near the famous Chris Owens nightclub, about a block away from Saturday's incident. Police placed the Saturday shooting in the 400 block of Bourbon Street. Patrick Clay, 21, a Louisiana State University student, told The Times-Picayune that he was standing on the corner of Bourbon Street on Saturday night when suddenly he saw a crowd running and people screaming that there had been a shooting. "Everyone immediately started running and the cops immediately started running toward where people were running from," Clay said. "I was with a group of about seven people and at that point, we all just kind of grasped hands and made our way through the crowd as soon as possible." Some bartenders and revelers said the block of Bourbon Street where the shooting occurred was closed for a time while detectives investigated, but partying resumed hours later across that stretch. Julia Rosenthal, a 19-year-old from Westchester, N.Y., had mixed feelings about hanging out in the French Quarter after the shooting. "It's not an OK thing that happened, and it's definitely scary. But I'm not going to let it affect my night," she said. Peter Manabani, an employee at the Rat's Hole bar, said police had shut down a whole Bourbon Street block for an hour to investigate but allowed people to return to the area later. Hours later on Sunday, there was little evidence that a shooting had occurred. Overnight revelers were in full party mode, packing the block amid a heavy police presence. Laura Gonzalez, 21, of Baytown, Texas, said it was her first Mardi Gras and she spent some time in the Fat Catz bar nearby as police investigated. She said the bar locked its doors quickly after the shots rang out and wouldn't let anyone in or out while police went to the scene. Asked if it was frightening, she responded: "Not really. We were just locked in a bar and we weren't going to let this one incident wreck our party." Parades rolled all day Saturday but none on Bourbon Street because the streets are too narrow. One of the biggest Mardi Gras parades, the Krewe of Endymion, rolled down a major thoroughfare and just skirted Bourbon Street a few hours before the shooting. Typically, once the parades end, partygoers head to the French Quarter.

ST. PETERS, Mo. (AP) -- Red-light cameras are a hot topic again in the St. Louis area following the arrest of a St. Charles County councilman over a ticket from last summer.

Republican Councilman Joe Brazil isn't disputing the ticket he received in St. Peters, but he tells the St. Louis Post-Dispatch that it's overkill for a city to use police time on arrests for offenses that don't add penalty points to a driver's license under Missouri law. Red-light camera violations fall into that category.

"I think it's a complete waste of police resources," Brazil said. "They're overdoing it."

Brazil said he mailed in the fine before his arrest, but St. Peters spokeswoman Lisa Bedian said the city has no record of receiving Brazil's check. Bedian said the city issues arrest warrants whenever someone doesn't show up for a court date on any charge, including red-light violations.

Other cities in the St. Louis region take different approaches, and many don't issue arrest warrants for red-light violations. The cameras have spurred debate since they have been increasingly used in the St. Louis area over the past few years. Companies install the equipment in exchange for a portion of the fines. Opponents see it as an unfair money-grab, while proponents argue that the cameras help save lives by discouraging drivers from skirting through red lights.

Wentzville, like St. Peters, issues warrants for nonpayment of red-light violations. Police spokesman Paul West said the decision may depend on the type of photo taken by the camera system. Wentzville and St. Peters both use cameras that capture the face of the driver, rather than simply a photo of the vehicle license plate.

"If I can't say who is driving, how am I going to know who to arrest?" West said. Brazil was pulled over for a traffic stop last month. The officer told him there was a warrant for his arrest, frisked him, put him in the back of the police vehicle and drove him to police headquarters, where he spent about an hour in a holdover cell. Brazil said he'd mailed a cashier's check to pay his $110 fine before his arrest.

Those caught on red-light cameras are first sent a summons giving them the option of paying the $110 fine or going to court, Bedian said. If they do neither, they get a letter with a second court date and a warning that an arrest warrant will be issued if they don't respond.

Authorities are identifying the man shot to death by two St. Louis police officers during Mardi Gras as 32 year old Otis Roberson.

Witnesses told police that Roberson had been brawling with another man and then pulled a gun, firing at least one shot into the air.

St. Louis Police Lt. Col. Lawrence O’Toole says two St. Louis police officers had been patroling nearby when they heard the shot. When arrived, the officers ordered Roberson to drop his gun, but instead he turned and pointed the weapon at police. O'Toole says both officers fired several shots, striking Roberson. The North County man later died at the hospital.

Mardi Gras Inc. spokesman Mack Bradley praised the officers for acting appropriately. Both officers had been working for Mardi Gras Inc. under a secondary employment agreement allowing police to work extra jobs during their off hours. Both are veterans with the St. Louis Metropolitan Police Department, one with 22 years on duty and the other with 33 years on the force. Both have been placed on routine administrative leave.

This is the first fatal shooting in the Soulard festival's 34 year history.

St. Louis police reported that 80 people were arrested during the Mardi Gras celebrations in Soulard Saturday. Seventy-six of them were juveniles arrested for consumption of alcohol by a minor.