Popular American rapper Blueface, who is known for mixing techno, R&B and hip-hop, was brutally stabbed at a boxing gym in Reseda. He was immediately rushed to a hospital after he suffered injuries, according to authorities.

According to TMZ, the rapper, and pretty successful amateur boxer, was training Wednesday morning at a gym in Los Angeles` San Fernando Valley when the attacker came into the gym. Security footage posted on Blue`s Instagram shows the trainer, David Kaminsky, trying to get in between the man and Blueface.