Four killed by bomb attacks in Medina and elsewhere in Saudi Arabia

Four security officers have been killed and five others injured in a suicide attack outside the Prophet's Mosque in Saudi Arabia's Medina, Islam's second holiest city, the Saudi interior ministry said. Photos on social media show smoke billowing from a fire outside the mosque. The blast occurred just before the Maghreb (sunset) prayers on Monday when people were breaking their fast inside the mosque. 
Saudi Arabia's state-run news channel, Al-Ekhbariya, aired live video of thousands of worshippers praying inside the mosque hours after the explosion. Around the same time as the Medina blast, two other explosions struck near a mosque in the eastern city of Qatif on the Gulf coast, residents said. Witnesses said a suicide bomber blew himself up outside a Shia mosque without causing any other injuries.
Early on Monday morning, two security officers were injured as a suicide bomber blew himself up near the US consulate in the Red Sea port city of Jeddah. Security officers became suspicious of a man near the car park of Dr Suleiman Faqeeh Hospital which is directly across from the US diplomatic mission. When they moved in to investigate, "he blew himself up with a suicide belt inside the hospital parking", the ministry said, adding that two security officers were lightly wounded.
In January, at least four people were killed in a suicide attack on a Shia mosque in the eastern al-Ahsa region.

In October, the Islamic State of Iraq and the Levant (ISIL) group claimed responsibility for a suicide bombing at a Shia mosque in Najran, in which at least one person was killed.
ISIL (also known as ISIS) had also claimed responsibility for an attack at a mosque inside a special forces headquarters in the city of Abha in August 2015. Fifteen people were killed in that attack.