HEMET, Calif. (AP) — A Southern California police department is investigating an altercation recorded on video in which an officer punched a trespassing suspect during an arrest.

KABC-TV reports the video posted on social media shows the Hemet police officer face-to-face with the man, who tells the officer he will take off a backpack he is wearing.

The video shows the officer grab the man, punch him and take him to the ground.

In a press release issued to KABC, the Hemet department says the investigation will include the social media posts and the officer's body-worn camera video.