(Oregon City, OR) -- An armed man fired several shots at tree cutters in Oregon City on Saturday. More than 20 rounds were fired. The tree cutters weren't hurt. The Clackamas County Sheriff's Office surrounded the suspect and launched a drone. The man was using a tractor to knock down trees to create a barricade. He shot at the drone. SWAT took 53-year-old Erik Shunn into custody. He's charged with Attempted Murder.