PITTSBURGH -- Two people were killed and a firefighter was hurt when a house went up in flames in Pittsburgh's Friendship neighborhood.

Firefighters were called to the home on Graham Street around 2 a.m. Wednesday.

Investigators said one of the victims died at the scene and the second victim died at an area hospital.

Emergency dispatchers said a firefighter injured his ankle fighting the blaze.

The victim's names have not been released.

The cause of the fire is under investigation.