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WASHINGTON (AP) - The Supreme Court has ruled that police must usually try to obtain a search warrant from a judge before ordering blood tests for drunken-driving suspects.

The justices on Wednesday sided with a Missouri man who was subjected to a blood test without a warrant and found to have nearly twice the legal limit of alcohol in his blood.

Justice Sonia Sotomayor said for the court that the natural dissipation of alcohol in the blood is generally not sufficient reason to jettison the requirement that police get a judge's approval before drawing a blood sample.

Missouri and the Obama administration were asking the court to endorse a blanket rule that would have allowed the tests without a warrant.

UPDATE 1:32 PM:

Power outages have decreased to just under 1400.

Over 5,000 customers in St. Louis city are reporting power outages at this time.

That includes the corridor of Hampton between Forest Park and I-44. We also got calls that the St. Louis Zoo was without power. A Zoo official tells KTRS News they are moving visitors out of the areas with animals--the animals are fine, but visitor buildings have no lights on. Visitors are allowed to wait in the Living World exhibit.

The outages are affecting customers in the zip codes of 63110, 63116, and 63139.

BOSTON -- ABC News -- Authorities are close to identifying a suspect in the deadly Boston Marathon bombing, an official in Boston told ABC News.

ABC News' Boston affiliate, WCVB, reported a source had said a suspect has already been identified and an arrest is imminent. Surveillance video taken from cameras at a Lord & Taylor along the marathon route helped identify the suspect, WCVB said.

A pair of blasts erupted Monday afternoon near the finish line of the Boston Marathon, killing three people and injuring more than 170 others.

Authorities said they have been analyzing thousands of photos of the event and tracking down as many leads since the bombing. Tuesday ABC News reported part of a pressure cooker bomb had been recovered from the scene with wires, shrapnel and a circuit board. That evidence has been sent to the FBI lap in Quantico, Virginia for analysis, officials said.