Superintendent Jitender Ranjan of NCB fired a round in air yesterday after he was attacked by a mob at a shack at Arambol beach where he had gone with a police team to question a suspect in a drug-related case.
Pernem police, who registered a case against four people including the shack owner for 'assaulting a government servant on duty', have received a counter-complaint.
No case was registered against the NCB officer as veracity of the complaint was yet to be checked, he said.
The shack owner was being questioned in the matter, the officer added.