A Canada-wide arrest warrant has been issued for the Ottawa man police allege shot Omar Rashid-Ghader to death in Ottawa over the weekend.

An Ottawa police officer was parked near Dalhousie and Clarence streets in Ottawa's ByWard Market around 3:20 a.m. Sunday when people began rushing out of the packed Sentral Nightclub saying someone had been shot.

Police have issued an arrest warrant for 28-year-old Mustafa Ahmed, an Ottawa man police believe was involved in a fatal shooting in Ottawa's ByWard Market early Sunday morning. He could be in the Greater Toronto Area, police say. (Ottawa Police)

Rashid-Ghader was found inside, suffering from multiple gunshot wounds. Police performed CPR and paramedics were brought in but he was pronounced dead at the scene.

Mustafa Ahmed, 28, is wanted by police on a charge of second-degree murder, and he is "considered armed and dangerous."

Ahmed was last seen in downtown Ottawa but is now believed to be in the Greater Toronto Area, Ottawa police said in a media release issued late Wednesday.

He is described as five feet eleven inches tall, about 141 pounds, with black, long, wavy hair and brown eyes.

Victim linked to Ottawa gang

Rashid-Ghader was known to police.

In 2005 he was convicted in a home invasion, and at that time police said he was a member of the Ottawa street gang the Ledbury Banff Cripps.

Omar Rashid-Ghader was 33 years old when he died of multiple gunshot wounds. (YouTube )

According to court documents, Rashid-Ghader and other members "terrorized" a family by entering their unit and refusing to leave. The gang threatened to hurt the occupants if they called police, according to evidence entered in court.

Rashid-Ghader was convicted of two counts of criminal harassment relating to the home invasion.

Friends say Rashid-Ghader was a rapper who went by the name Esco or Escobar.