Bomb Blast outside mosque in Damam Saudia Arabia 29 May 2015. Bomb Blast outside mosque in Damam Saudia Arabia 29th May 2015

An Imam Hussein mosque in al-Damam, eastern Saudi Arabia, was targeted by a suspected suicide bomber during Friday prayers.

The Saudi interior ministry claimed that four people were killed in the attack on the Shia mosque on Friday, while five were injured. A Saudi social media report identified one of those killed in the blast as Abduljalil Juma. And the security guard, who foiled the attack has been identified as Saeed al-Arbash.

An image posted on social media showed Friday worshippers attending to a visibly injured man lying on the ground near the explosion site.

A Reuters report citing an eyewitness identified as Ahmed noted that "a quick explosion" took place near the mosque. The eyewitness said a security personnel, who refused to let the suicide bomber inside the building, was killed in the blast.

The blast took place at the parking lot near the Imam al-Hussein Mosque in the Saudi city of Dammam.

A widely shared image on Twitter shows the Saudi security personnel inspecting the blast site, with the remains of the alleged suicide bomber lying near the car's wreckage.

A video posted on Twitter claims that the blast took place minutes after the Imam of the mosque started delivering the Friday sermon.

This would be the second time in less than a week a Shia mosque has been targeted in the predominantly Sunni kingdom.

The attack comes days after a suicide bomber targeted the Shia-Imam Ali Mosque in al-Qadeeh, a village located in Saudi Arabia's eastern Qatif province, on 22 May.

It occurred when worshippers were celebrating the birth of Imam Hussein in the seventh century and revered by Shiites