A co-worker suspected in the Monday morning shootings of a bus driver and another man in the employee lot of a northern Virginia bus station surrendered later in the day, authorities said.

Police said the suspect, Glen Kinard Wade, and one of the victims, bus driver Darnell McPherson, had a fight before shooting broke out about 11 a.m. at the Potomac and Rapphannock Transportation Commission.

Details of their fight were not released and the slayings were still under investigation.

McPherson, 32, of Dale City and William Anderson Jr., 34, of Woodbridge were killed. Both McPherson and the suspect were commission employees, while Anderson was an outside contractor.

Police launched an extensive manhunt and searched by helicopter for the shooter, who escaped on foot. A handgun was found near the shooting scene, as was a bullet-ridden sport utility vehicle.

Wade, a 40-year-old from Woodbridge, turned himself in to Prince William County Police about 7:30 p.m. Monday. He is charged with murder and was being held without bond. A court hearing was set for Sept. 15. Police said they didn't know if Wade had an attorney.

The employee lot is located on the opposite side of the building from where passengers board buses, Christine Rodrigo, a spokeswoman for the commission said. The building also serves as the commission's headquarters.

The shooting caused heavy disruptions to afternoon bus service provided by PRTC, much of which serves commuters who ride into Washington from Prince William County. Police used dogs to individually search dozens of buses for the suspect, which kept them out of service for the afternoon rush hour. Residents of Prince William County have some of the country's longest average commutes.