HARTFORD, Conn. – A 200-pound chimpanzee kept as a pet attacked and seriously injured a woman visiting a Stamford home Monday, police said.

The chimpanzee named Travis, who once appeared in television commercials, was shot and killed by an officer when he charged police and cornered that officer in his cruiser, police said Monday.

The injured woman was hospitalized late Monday in very serious condition at Stamford Hospital, police said. Her identity was not immediately released.

Stamford police Capt. Richard Conklin said the woman was getting out of her car in front of her friend’s house when Travis attacked her for no apparent reason.

Sandra Herold, the owner of the 15-year-old chimpanzee, wrestled with the animal as it mauled her friend, then ran inside to call 911.

“She retrieved a large butcher knife and stabbed her longtime pet numerous times in an effort to save her friend, who was really being brutally attacked,” Conklin said.

The woman suffered “a tremendous loss of blood” from serious facial injuries, he said.

Travis ran away and started roaming on Herold’s property as police arrived, setting up security so medics could reach the critically injured woman lying on the ground, Conklin said.

But the chimpanzee returned and went after several of the officers, who retreated into their cars, Conklin said. Travis knocked the mirror off a cruiser before opening its door and starting to get in, trapping the officer.

That officer shot the chimpanzee several times, Conklin said.

The wounded chimpanzee fled the scene, but Conklin said police were able to follow the trail of his blood: down the driveway, into the open door of the home, through the house and to his living quarters, where he had retreated and died of his wounds.

“There was no provocation that we know of. One thing that we’re looking into is that we understand the chimpanzee has Lyme disease and has been ill from that, so maybe from the medications he was out of sorts. We really don’t know,” Conklin said.

Herold and two officers also received minor injuries, police said.

A message seeking comment was left Monday night at Herold’s home.

The chimpanzee was well-known around Stamford because he rode around in trucks belonging to the towing company operated by his owners.

Police have dealt with him in the past, including an incident in 2003 when he escaped from his owners’ vehicle in downtown Stamford for two hours. Officers used cookies, macadamia treats and ice cream in an attempt to lure him, but subdued him only after he became too tired to resist.

At the time of the 2003 incident, police said the Herolds told them the chimpanzee was toilet trained, dressed himself, took his own bath, ate at the table and drank wine from a stemmed glass. He also brushed his teeth using a Water Pik, logged onto the computer to look at pictures, and watched television using the remote control, police said.

When he was younger, Travis appeared on TV commercials for Old Navy and Coca-Cola, made an appearance on the “Maury Povich Show” and took part in a television pilot, according to a 2003 story in The Advocate newspaper of Stamford.

“He’s been raised almost like a child by this family,” Conklin said Monday. “He rides in a car every day, he opens doors, he’s a very unique animal in that aspect. We have no indication of what provoked this behavior at all.”