Police in Northern Virginia are searching for a suspect who reportedly shot three of his co-workers at a United Rentals location Wednesday morning, leaving all of the victims in critical condition.Manassas Police say the suspec t, identified as Marvin Grant, opened fire following a dispute with co-workers. Two victims were reportedly shot in the garage area, while a third was shot coming out of an office.All three victims are in critical condition at local hospitals.A photo of the suspect was not provided.Police said Grant may be driving a gray Toyota Camry or Toyota Corolla with temporary North Carolina tags.Law enforcement did not provide any additional details at this time.This story was originally published by the Scripps News Group in Richmond, Virginia. ...read more read less