A man in his late 50s found dead in the hallway of an apartment building in Clayton Park was a victim of homicide, Halifax police said Friday evening.

Halifax Regional Police were called to 10 Harlington Cres. at 10:13 p.m. on Thursday and discovered the body. A second man was found on a nearby street with serious injuries and taken into custody.

The dead man's identity has not been disclosed and police said it is being held back until family have been notified.

Officers removed his body from the apartment building early Friday morning. The medical examiner did an autopsy later in the day and police said they declared the death a homicide based on the findings.

Forensic officers enter building on Harlington Crescent where a body was found last night. <a href="https://t.co/FgYLoP1wRh">pic.twitter.com/FgYLoP1wRh</a> —@shainaluck

The 20-year-old man arrested near a Halifax Transit bus stop on Willet Street soon after the man's body was discovered is still in police custody at the Queen Elizabeth II Health Sciences Centre where he was taken for treatment of serious injuries.

Police said they believe the victim and the suspect knew each other.

Anyone with information, especially anyone who may have seen the 20-year-old leaving the building, is asked to call police or Crime Stoppers, or submit a tip online.