MILWAUKEE (WRN) - One man has been arrested, and Milwaukee Police are looking for 2 others who stole a truck carrying 900 doses of the H1N1 swine flu vaccine. It happened about 7:50 p.m. Thursday, while the truck was running idle outside of a school where almost 2,000 people were vaccinated earlier in the day. Police said the truck driver was picking up medical supplies at the school, and the vehicle kept running so a refrigeration unit holding the vaccine could stay on. Witnesses later pointed officers to a 38-year-old suspect who was walking out of a liquor store at the time. The witnesses said he was one of 3 people inside the vehicle when it was lifted. The truck was found abandoned about 40 minutes later. The vaccine was still in it, but it cannot be used. Milwaukee health officials said the 900 doses were considered to be compromised because they went out of the city’s control. Officials are not sure if the vaccine can be replaced – but they say they have enough for another swine flu clinic scheduled Friday.