Saudi authorities have identified an Egyptian national as the second attacker involved in a recent suicide bombing against a Shiite mosque.

Interior Ministry spokesman Maj. Gen. Mansour al-Turki said in a statement Monday that the attacker, Talha Hesham Abdo, lived in the kingdom on a visitor visa since 2013.

Abdo and a Saudi national identified a day earlier as 22-year-old Abdulrahman al-Tuwaijri both were wearing explosive belts. Abdo was wounded and detained after an exchange of gunfire with security forces outside the mosque.

Al-Tuwaijri died when he detonated his device at the entrance of Imam Reda Mosque in al-Ahsa, killing four people and wounding another 33 during Friday prayers.

No group has claimed responsibility for the attack, but Islamic State militants have targeted the kingdom's minority Shiites in the past.