Members of Saudi security forces stand guard in Manfouha, southern Riyadh, in this November 9, 2013 file photo.

Several Saudi worshippers at a mosque in Riyadh on Friday cornered a young supporter of the Daesh terrorist group and handed him over to the police.

The man, in his twenties, had been attending the noon prayers at Al-Shuhada mosque in Riyadh. The congregants followed him to his car and held him there until the police arrived.

The video of the incident was posted on social media on Friday. One person said that the late Prince Naif, who had been the interior minister, had always argued that the fight against terrorism could only be effective with the support of citizens, who must hound those supporting extremists groups.

The Interior Ministry has regularly asked citizens to report suspicious behavior and activity on its 990 telephone number, because this was one of the most effective ways to prevent terror attacks in the Kingdom.

The Kingdom has over the past few months broken up several cells of people involved in planning attacks on targets in the Kingdom. The Saudi nationals involved were all members of Daesh, also known in English as the Islamic State of Iraq and the Levant.