Niagara Regional Police are asking for witnesses and surveillance footage as a homicide investigation continues.
Officials discovered a 32 year old man with gunshot wounds in the Glendale Ave and Marsdale Drive area of St. Catharines yesterday around 8:30 p.m.
He was taken to hospital and pronounced deceased.
Detectives are still on scene this morning looking for witnesses or footage from 6 p.m. to 10 p.m.
In particular, police are looking for footage including a dark blue or black four door E- or S-Class model Mercedes Benz and a 4 door grey Dodge Ram pick-up truck with the word 'Rebel' written on the side.
The truck's licence plate reads BE 95676.
Officers also want to see footage from the area containing two 6 foot tall black men with slim builds. They were last seen walking south on Marsdale toward Glendale.
A man was taken into custody as part of the investigation, but released unconditionally.
Officials do not believe there is an ongoing threat to public safety.