Pictures shared on social media purport to show people running away from the mosque attack.

Saudi on Monday revealed the identity of the second would-be suicide bomber behind a recent attack on a mosque in the eastern al-Ahsa region, Al Arabiya News Channel reported.

The attack killed four people and injured 18 worshipers during Friday prayer after one of the two suicide bombers was able to blow himself up.

The suicide bomber behind the blast was a Saudi. But the second culprit, who was unable to detonate himself, was an Egyptian, the Saudi interior ministry said, revealing his name as Talha Hisham Mohammed Abda.

To curb terror attacks, the Saudi interior ministry on Sunday announced that it will give citizens seven million Riyals ($1.8 million) as a reward if they help in foiling terrorist attacks in the kingdom.

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