Possible explosive device found in Vienna parking lot A Fairfax County bomb squad disposed of an inert grenade found in the parking lot of a Vienna automotive store Wednesday morning, police said. An employee of the Merchant's Tire and Auto Center on Maple Ave. discovered the device around 7:30 a.m. and alerted authorities, Vienna Police said. Authorities shut down Maple Avenue between Lawyers Road and Center Street as they investigated, police said. The Fairfax County bomb squad then used a robot to remove the grenade, police said. Investigators determined the grenade had no explosive material inside and Maple Ave. was reopened shortly after 9 a.m., police said. Police said it was unclear who left the device in the parking lot or why it was left there.