Ohio police arrested four men early Friday on charges of stealing Mitt Romney campaign signs that were found in a union-owned pickup truck, the Cleveland Plain Dealer reported.

The signs, some as large as four feet by eight feet, were allegedly stolen from private property and business areas in Wood and Lucas counties in northwest Ohio. They were believed to have been put up by the Northwest Ohio Conservative Coalition, the newspaper said. Ohio is a critical swing state in Tuesday’s presidential election.

Police cited Corey Beaubian, 37, Sean Bresler, 33, John Russell, 39, and Christopher Monaghan, 41, with receiving stolen property, a misdemeanor offense according to the Toledo Blade. Police said the truck, owned by Sheet Metal Workers Local Union 33, contained drills and other tools that could be used to take the bigger signs down.

According to the Plain Dealer, police were not certain the four men are union members, but Russell and Monaghan were both listed as business agents for the Toledo district.

“There have been wide reports of Romney signs being stolen for many weeks…this is the first we heard of anyone being caught,” John McAvoy, president of the Northwest Ohio Conservative Coalition, told the newspaper.