Northamptonshire Police have named the three men who died in two separates crashes in Corby on Sunday and Monday.
Luke Brady, 23, of Corby, died early on Sunday morning after being found seriously injured in Studfall Avenue at 1am.
A 19-year-old man was arrested on suspicion of causing death by dangerous driving and has since been released on bail pending further enquiries.
Two men also died during a road traffic collision on the A6003 early on Monday morning.
The crash took place between the Oakley Hay roundabout and the BP Fourways roundabout, when for reasons yet unknown, a red BMW and silver Vauxhall Corsa were in collision.
Oliver Geddes, 25, of Desborough, was driving the BMW and 23-year-old Grzegorz Tobola, of Corby, was driving the Corsa. Both men died at the scene.
Police would still like to speak to anyone who may have witnessed either of these collisions or who may have any information regarding them.
Anyone with information or who witnessed them is asked to call the Drivewatch Hotline on 0800 174 615.