Two people have been killed in an explosion outside the Prophet`s Mosque in the Saudi Arabian city of Medina, Al Jazeera reported citing sources.
Photos on social media show smoke billowing from a fire outside the mosque where Prophet Muhammad is buried, according to Al Jazeera.
The cause of the explosion was not immediately known. Some reports suggested it was a suicide bombing, while others said a gas cylinder had blown up.
Two other explosions struck near a mosque in the eastern city of Qatif on the Gulf coast on Monday evening, residents said.
Witnesses said a suicide bomber blew himself up outside a Shia mosque without causing any other injuries.
They reported seeing body parts lying on the ground in the city`s business district.
As reported earlier, on Monday morning, two security officers were injured as a suicide bomber blew himself up near the U.S. consulate in the Red Sea port city of Jeddah.