Police have arrested a man they say stole a truck carrying 900 doses of swine flu vaccine.

Officers in Milwaukee say the suspect is a 38-year-old man with a criminal record. Police are looking for two other men who were seen in the vehicle with him.

The truck was taken just before 8:00 p.m. Thursday night as it idled outside a swine flu clinic. Officers found the abandoned truck less than an hour later with the vaccine intact.

City health workers say even if the vaccine hasn't been tampered with, it's still considered "compromised" because it was out of city possession and can no longer be used.