Public Security Minister Gilad Erdan tweeted that the officer’s behavior should be “looked into on a disciplinary level.”

Watch: Israeli officer slaps protester in Rahat

An Israeli police officer will be investigated for brutality after a video showed him slapping a detainee for no apparent reason during a Friday protest in the Bedouin city of Rahat.

Police said the man had resisted arrest, adding that the officer had been hit with a club by a protester prior to the incident. A longer video shows the officer falling to the ground just before slapping the detainee.

Israel’s Public Security Minister Gilad Erdan wrote on Twitter that the video “raises tough questions about the officer’s behavior,” adding that “his behavior should undoubtedly be looked into on a disciplinary level.”

Musa, a relative of the man who was slapped by the officer, expressed his frustration and accused Erdan of providing automatic support for the police.