One officer said efforts made to find out the reason for the non-payment have not received any concrete feedback from the Force Headquarters.
Fifty-one sergeants comprising 42 males and nine females were promoted to their new ranks of inspector.
The spokesman said three others were injured when they were attacked by no fewer than 60 armed hoodlums.
The officers collected N70,000 from a student at Isheri, Lagos, on Monday.
Police said the assaulted officer was carrying out his lawful duties.
The fighting cocks are usually armed with a gaff —a razor sharp steel blade fixed on their feet.