Toronto police are investigating a fatal shooting at an apartment building in North York, near Jane Street and Finch Avenue West.

Officers were called to the 11th floor of the building on San Romanoway, just after midnight Thursday.

Police discovered the victim, a man believed to be in his 20s, suffering from a gunshot wound. He was pronounced dead at the scene a short time later.

Video surveillance captured two men running east of the building, but police said they cannot confirm whether either of the men are considered suspects.

It's believed that shell casings thought to originate from a semi-automatic handgun were recovered at the scene, CP24’s Cam Woolley reported Thursday.

The circumstances leading up to the fatal shooting are still unclear.

Police are reviewing the building’s surveillance tapes. The investigation continues.