Calgary police say the cause of death of a youth in the northwest community of Citadel remains under investigation.

An autopsy has been completed, but officials say more forensic testing is needed.

Police received a call Tuesday evening around 10 p.m. MT.

EMS said crews found a teenage boy in medical distress when they arrived at the home in the 100 block of Citadel Drive N.W. A spokesman said they were not able to resuscitate the teen.

The death is being called suspicious and the Calgary police are continuing their investigation.