LAS VEGAS -- Police say a man is in critical condition after the deadly toxin Ricin was found in his room at a motel in Las Vegas. Officer Lt. Lewis Roberts said the man has been in a coma since he was found in his room at the Extended Stay America Motel on Thursday afternoon.

He's one of seven people hospitalized after the Ricin was discovered. Police have said most were examined as a precaution.

Investigators don't think foul play is involved and the FBI said the case doesn't appear to be terrorism-related. But authorities aren't sure why the man had a vial of powdered Ricin in his room.

A man turned a vial of the poison over to hotel workers around 3 p.m. Thursday. It was inside a plastic bag. Once they started the investigation, police also found castor beans inside the room where the Ricin was found.

Ricin can be deadly if ingested, inhaled or injected into the body. Authorities said that two-tenths of a milligram is enough to kill a person. It has been used in some cancer research, but it has also been used in assassinations and turned up in the homes of suspected terrorists.

Ricin is 6,000 times more toxic than cyanide.