Milwaukee police have arrested a man accused of stealing a truck carrying 900 doses of swine flu vaccine.

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 Thursday night as it idled outside a swine flu clinic.

Officers found the abandoned truck less than an hour later with the vaccine apparently intact. As they investigated, a witness pointed to the 38-year-old leaving a nearby liquor store and identified him as one of the three men in the truck.

City health official Raquel Filmanowicz says even if the vaccine hasn't been tampered with, it's still considered "compromised" because it was out of city possession. She says it can no longer be used.