The New York Daily News reports that police are trying to determine who placed a mysterious tracking device on an MTA bus at a depot in Staten Island. Two maintenance workers at the Yukon Bus Depot on Yukon Avenue in New Springville found the tracker attached to an oil pan at about 11 a.m. Wednesday. MTA officials called police, and NYPD Emergency Service Unit cops swarmed the depot, searching each bus and the terminal itself looking for additional devices, sources said. The device was not an explosive. READ MORE