POLICE in Missouri are investigating the possibility that a woman was on synthetic drugs marketed as "bath salts" when she attacked and bit her neighbor, KCTV reported Friday.

It was not clear if the unidentified woman has been charged in the attack. Her landlord said she had not returned to her Kansas City home and could be in a hospital or mental health facility.

The victim, Charles McBride, said she attacked him last week and bit his arm where he had a nicotine patch.

"I've seen her do some crazy stuff, but not that," McBride told KCTV.

After biting him, he recalled, the woman dropped to all fours and began "digging in the ground, like a dog would."

When police arrived at the scene, "they tried to grab her and then she started kicking back at them," according to McBride.

A police report corroborated the victim's account, saying, "her left leg was mule-kicking and she had what appeared to be dirt in her mouth."

Bath salts have been known to make some users aggressive and behave bizarrely.

Authorities in Florida suspect that Rudy Eugene was on the drugs when he was fatally shot by cops on May 26 beside a Miami freeway. He was naked and chewing on the face and eyes of 65-year-old homeless man Ronald Poppo, and reportedly continued even after he had been shot once by an officer.

Bath salts are also believed to have been involved in the cases of two other Miami-area men.

One of them growled at police while in custody and attempted to bite off a cop's hand, and the other allegedly exposed himself to a three-year-old girl while sexually threatening her at a children's playground near the North Miami Beach police headquarters.