After detailed maps of local military operations and anti-government slogans were found in a south Minneapolis apartment, federal authorities are now involved in the investigation.

The residence three tenants were evicted from the property this weekend, but what they left behind has caught the interest of the FBI and Homeland Security.

A cleaning crew made the discovery shortly before 12 p.m. on Tuesday.

One of the workers told 5 EYEWITNESS NEWS they noticed maps on the walls with government chains and commands.

Inside a closet, they found numerous rolls of maps.

"We ran into a bunch of blue prints of Minneapolis-St. Paul Army Air Force property. It had thickness of walls, hour ratings, explosives and fires," said one of the men with the cleaning crew, who wished to remain anonymous.

They also discovered several bumper stickers with anti-government messages.

The crew then called Minneapolis Police who have since collected the items as evidence.