Man shot dead by masked gunman while he was live-streaming on Facebook

Friends watched helplessly as a young man was shot dead by a masked gunman who barged into his apartment while he was live streaming on Facebook.

The young man who has been identified as 24-year-old, Julio César Castillo, was live on Facebook as he sat in his living room, singing and drinking at 7:13 pm on Monday. August 9, until a man shot at him five times while his Facebook friends watched helplessly.

Julio César immediately gets up from his couch and runs to another side of the apartment before he trips and falls, as the shooter who is now in view of the camera, fires more shots at the young man, then reloads his ammunition.

A 17-year-old in the apartment at the time of the shooting is seen running towards a room before he gets shot.

Footage shows Castillo crawling on the ground with gunshot wounds when the killer walks over and continues to fire at him before fleeing.

Castillo was rushed to the Puerto Rico Medical Center in San Juan, where he was pronounced dead at 7:05am Tuesday, August 10.

The 17-year-old who was also hit was taken to the hospital and expected to recover fully.

The killer remained on the run as of Wednesday afternoon, August 11.