Police are trying to find witnesses who can tell them about a fatal fight near the Calgary Drop-In and Rehab Centre on Sunday.

John Walmsley died after being stabbed early that morning.

Police also have access to several video surveillance recordings.

"The Drop-In Centre has surveillance video, we are looking at it," said Staff Sgt. Grant Miller. "The City of Calgary CCTV system is also present in the area. We have seized video from there as well and we're reviewing that."

Anyone with information is asked to contact police or Calgary Crime Stoppers.