SAN DIEGO -- San Diego State University has suspended six fraternities after a sweeping drug investigation that landed dozens of students in jail on suspicion of openly dealing drugs on campus.

Twenty-nine people were arrested early Tuesday in raids at nine locations including the Theta Chi fraternity, where agents found cocaine, Ecstasy and three guns, authorities said. Eighteen of those arrested were wanted on warrants for selling to undercover agents.

Theta Chi and five other fraternities have been suspended pending a hearing on evidence gathered during the investigation, dubbed Operation Sudden Fall.

All of the arrested students have been suspended and will be barred from attending classes or taking final exams until their cases are reviewed, San Diego State President Stephen Weber said in a statement. Those who live in university-owned housing were evicted, he added.

ATLANTA -- People who sleep fewer than six hours a night -- or more than nine -- are more likely to be obese, according to a new government study that is one of the largest to show a link between irregular sleep and big bellies.

The study also linked light sleepers to higher smoking rates, less physical activity and more alcohol use.

The research adds weight to a stream of studies that have found obesity and other health problems in those who don't get proper shuteye, said Dr. Ron Kramer, a Colorado physician and a spokesman for the American Academy of Sleep Medicine.

"The data is all coming together that short sleepers and long sleepers don't do so well," Kramer said.

PORTLAND, Ore. -- Federal officials investigating the deaths of six sea lions at a Columbia River dam did an about-face Wednesday, saying their initial assumption that the animals had been shot to death was wrong.

Officials have not ruled out human involvement, but the conclusion from preliminary necropsy results that shootings did not kill them reopened questions of how the animals died.

The National Marine Fisheries Service's initial reports about the deaths raised intense interest in the long-running dispute over the sea lions, which prey on protected salmon. As a consequence, the government and the Humane Society of the United States agreed to suspend trapping and removing the sea lions this year.

But the preliminary results of the examination of the carcasses found no evidence of recent gunshot wounds, fisheries spokesman Brian Gorman said.

The necropsy results showed shallow puncture wounds in one animal consistent with sea lion bite marks, and X-rays found metal fragments in soft tissue near the neck of two animals, Gorman said.

A metal slug was found in the blubber of one animal. But neither the fragments nor the slug appear to be fatal and may have been from old wounds, he said.

ST. PETERSBURG, Fla. -- Bailiffs shot and killed a man who opened fire in the lobby of a downtown courthouse Wednesday afternoon, sheriff's officials said.

One of the two bailiffs who fired at the unidentified man suffered a non-life-threatening shoulder wound, Pinellas County Sheriff's Sgt. Jim Bordner said. At least four other people were in the lobby at the time but no one else was hurt, Bordner said.

The gunman entered the courthouse shortly after 1 p.m. Wednesday and approached a security checkpoint wearing a backpack. A deputy ordered him to remove the backpack and place it on a conveyor belt, but the man instead threw it on the ground and opened fire with a semiautomatic handgun, Bordner said.

Deputies B.J. Lyons and Marvin Glover returned fire, fatally wounding the man, who died later at a St. Petersburg hospital. Lyons, 58, who suffered the shoulder wound, was released from the hospital by late afternoon.

LANSING, Mich. -- Local governments and state universities in Michigan can't offer health insurance to the partners of gay workers, the state Supreme Court ruled Wednesday.

The court ruled 5-2 that Michigan's 2004 ban against gay marriage also blocks domestic-partner policies affecting gay employees at the University of Michigan and other public-sector employers.

The decision affirms a February 2007 appeals court ruling.

Up to 20 public universities, community colleges, school districts and local governments in Michigan have benefit policies covering at least 375 gay couples. After the appeals court ruled, universities and local governments rewrote their policies to try to comply with the gay marriage ban -- so the effect of Wednesday's decision is unclear.

The new policies no longer specifically acknowledge domestic partnerships but make sure "other qualified adults," including gay partners, are eligible for medical and dental care. The adults have to live together for a certain amount of time, be unmarried, share finances and be unrelated.

The voter-approved law, which passed 59 percent to 41 percent, says the union between a man and woman is the only agreement recognized as a marriage "or similar union for any purpose."

NEW YORK -- The Rev. Al Sharpton was arrested at the Brooklyn Bridge on Wednesday as he and hundreds of demonstrators blocked traffic to protest the acquittal of three detectives in the 50-bullet shooting of an unarmed black man on his wedding day.

Sharpton, two survivors of the shooting and the slain man's fiancee were among about a dozen people arrested on disorderly conduct charges near the base of the bridge. Police led away demonstrators at several other bridges and tunnels in the city.

The protests were part of a coordinated campaign to urge federal authorities to investigate the November 2006 shooting of Sean Bell. Three officers were acquitted of state charges last month.

Sharpton, shooting survivors Trent Benefield and Joseph Guzman, and Bell's fiancee, Nicole Paultre Bell, lined up and peacefully put their hands behind their backs as police put plastic handcuffs on them. Sharpton and Bell were placed in a police vehicle.

The civil rights leader is seeking a federal civil rights probe into Bell's shooting outside a Queens nightclub. The case raised questions about police use of deadly force in minority neighborhoods.