TAMPA, Florida (Reuters) -- A rare Sumatran tiger was shot and killed by the head of a Florida zoo after it escaped from its cage and charged at a veterinarian, zoo officials said.

Enshala, a 180-pound female tiger, was being put into her night house when she slipped past an unlocked latch and headed toward a public area Tuesday. A veterinarian shot Enshala with a tranquilizer dart. But she then charged at him, and zoo president Lex Salisbury killed her with a shotgun.

"I feel sick to my stomach," Salisbury, head of the Lowry Park Zoo in Tampa, told the St. Petersburg Times. He said he felt he had to shoot to protect the veterinarian.

Sumatran tigers are found in the wild only on the Indonesian island of Sumatra, where fewer than 500 remain, according to the World Wildlife Federation.

Enshala was born at the zoo 15 years ago. The zoo has one other Sumatran tiger, a 5-year-old male named Eric.

Alaska governor concedes defeat in primary

ANCHORAGE, Alaska (Reuters) -- Republican Gov. Frank Murkowski lost his bid for a second term on Tuesday, making him the first incumbent Alaska governor in 20 years to be unseated in his party's primary election.

Thai police: Karr said he had 'sex' with JonBenet

(CNN) -- John Mark Karr, the man facing charges in the slaying of 6-year-old JonBenet Ramsey 10 years ago, told an officer in Thailand last week that he had sex with the girl before she died but added "there was no penetration," Thai Immigration Chief Gen. Suwat Tumrongsiskul told CNN on Wednesday.

Hundreds of body parts recalled

WASHINGTON (AP) -- -- A leading medical firm has quietly recalled hundreds of human tissue products destined for transplants around the nation that were supplied by a North Carolina body parts broker believed to have a tainted history.

Northwest wildfires spark evacuations

DAYTON, Washington (AP) -- Nursing home residents were evacuated Tuesday when smoke from a nearby wildfire, one of several started by lightning, rolled across Washington.

Two killed in police charity bike ride

COVINGTON, Indiana (AP) -- A van accompanying bicyclists riding to raise money for slain police officers was struck by a truck and spun into the group, killing a state trooper and a retired sheriff's official, authorities said. Another cyclist was injured.