Lebanese investigators are searching for the suspects involved in a grenade attack at the headquarters of Beirut-based broadcaster Al-Jadeed.

The independent television network was attacked Feb. 2 following a protest for a comedy show called “Qadh and Jam.” Surveillance video shows the vehicle, a Kia Picanto, that investigators believe is responsible for the attack.

A group of protesters are angry over the comedy show’s depiction of “caricatured Druze clergy,” according to the non-profit Committee to Protect Journalists, which is now calling on Lebanese authorities to further investigate the crime.

“Those who perpetrated this attack on Al-Jadeed TV’s Beirut office should be swiftly held to account to show that attacks on media will not be tolerated in Lebanon,” said Sherif Mansour, the organization’s Middle East and North Africa coordinator. “Lebanese authorities should take steps to ensure the safety of journalists regardless of the outlet they work for and their political or religious affiliation.”

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CPJ reported that Druze employees of Al-Jadeed have received anonymous threats following the broadcast of the controversial episode.

According to investigators, a group of unknown suspects threw a hand grenade and fled the scene. No one was injured, but there was reported damage to the entrance and a nearby vehicle.