Three men have been charged with felonies in southwest Illinois for what police say was the theft of 10,000 gallons of used cooking oil.

According to the Belleville News-Democrat, 32-year-old Bo Lin of Fairview Heights, 25-year-old Tuo Li of Chicago and 30-year-old Kentvy Wong of Flushing, New York, have been charged with felony theft after their arrests on July 16.

Police arrested the three in a barn where the cooking oil was found.

According to St. Clair County court records none of the three has yet entered a plea or has an attorney. Contact information couldn’t be found to try to reach the men for comment.

Police believe the cooking oil was being taken from outside restaurants to sell to biodiesel plants.