Saudi Emir of Medina Faisal bin Salman bin Abdulaziz (C-L) and security officers inspect the site of the suicide attack

In this Monday July 4, 2016 TV grab from footage released by Al-Ekhbariya, Saudi security forces investigate the scene of an explosion in Jeddah

Saudi security personel gather at the site of the suicide attack near the security headquarters of the Prophet's Mosque in Medina City

A picture taken July 4, 2016 shows damaged vehicles at the site of the suicide attack near the security headquarters of the Prophet's Mosque in Medina City.

A picture taken July 4, 2016 shows of the covered body of the suspected suicide bomber at the site of the suicide attack near the security headquarters of the Prophet's Mosque in Medina City.

In this photo provided by Noor Punasiya, people stand by an explosion site in Medina, Saudi Arabia, Monday, July 4, 2016.

Muslim worshippers gather after a suicide bomber detonated a device near the security headquarters of the Prophet's Mosque in Medina, Saudi Arabia, July 4, 2016.

A damaged car is seen after a blast near the U.S. consulate in Saudi Arabia's second city of Jeddah July 4, 2016.

Saudi Emir of Medina Faisal bin Salman bin Abdulaziz (2R) and security officers look at blood stains on the ground after a suicide attack near the security headquarters outside one of Islam's holiest sites, the Prophet's Mosque in Medina on July 4, 2016.

In this Monday, July 4, 2016 photo released by Saudi Press Agency, SPA, Sheikh al-Faleh, center, deputy director of the Prophet's Mosque, and others visit a man who was injured when a suicide bomber attacked a Jeddah mosque Monday, at a hospital in Medina, Saudi Arabia.