OTTAWA -- Ottawa police say a man is facing four charges after an officer was allegedly assaulted during a traffic stop and a gun was fired by an OPP officer who intervened.

No one was injured by the gunshot in the weekend incident but police say a conducted energy weapon was deployed before the suspect could be arrested.

Police say it began around 3:30 p.m. Saturday when it's alleged a man pulled over by officers became combative and assaulted one of them as they tried to subdue him.

A provincial police officer who was in the area saw the altercation and went to help the other officers and police say that officer discharged a firearm once.

Luqman Abdunnur, 39, is charged with assaulting police, obstructing a peace officer, resisting a peace officer and driving while under suspension.

The matter remains under investigation by Ottawa police.