Officers were called to London Road in the early hours of Saturday.
A man was found with gunshot injuries and was taken to hospital where his condition was assessed as non-life threatening.
A short time later, the emergency services were called to a collision between two cars in Morland Road.
The occupants of one of the vehicles, a black Astra, left the scene without providing details.
The three occupants of the other vehicle suffered minor injuries.
Enquiries are ongoing to establish whether the incidents are related.