The first information report was filed with regard to the killing of labourers in Gwadar on Sunday, said security officials.
FIR was registered against unknown persons on behalf of the injured labourer, Qadir Bakhsh, at Gwadar Levies station.
The case has been registered for murder, attempted murder and terrorist acts, said Levies sources.
10 labourers were killed on Saturday when unknown gunmen opened fire in two separate attacks in Gwadar. The labourers were working at the construction sites, three kilometres apart, when two gunmen on a motorbike opened fire, local administration official.
In the aftermath of the attack, security has been heightened and security personnel are conducting raids apprehend the suspects, said Levies sources.