Suicide bombers staged attacks in three cities in Saudi Arabia on 4 July.
A suicide bomber killed four security guards outside the Prophets Mosque in Medina in the evening.
The Interior Ministry says that five others were injured in the attack, which occurred when a person heading towards the mosque across a vacant plot of land was challenged.
The attack was the second attack in Saudi Arabia that evening. In the Mias Market in Qatif a suicide bomber detonated a device and the Interior Ministry says the remains of three people are in the process of being identified.
In the early hours of 4 July a suicide bomber blew himself up in Jeddah near the parking lot of the Dr. Suleiman Faqih Hospital next to the US consulate. That attack also injured two security guards.