Medina: Medina: At least three people were killed in the blast outside the Prophet’s Mosque in Medina in Saudi Arabia on Monday.
The dead included a suicide bomber and two security officers, Saudi-owned al-Arabiya television reported.
The bomber detonated his device as security officers were breaking their Ramadan fast.
Footage on the TV network showed a blazing vehicle. There are no details of casualties and no official comment.
Pictures on social media show dark smoke billowing from flames near the mosque, where the Prophet Mohamed is buried.
The blast is believed to have occurred at sunset, when people were beginning to break their fast for Ramadan.
Muslims believe Prophet Mohamed built the mosque himself shortly after arriving in Medina after fleeing Mecca.
The attack was the third suicide attack in less than 24 hours.
A suicide bomber blew himself up in the car park of a mosque in the eastern city of Qatif – where most of the country’s Shia minority live.
Another suicide attacker struck in Jeddah, on the west coast, in the early hours of Monday morning after detonating a device near the US consulate.
Two security officers were injured as they tackled the man to the ground.
The attacks come on the eve of Eid al-Fitr which marks the end of the holy month of Ramadan.
The possibility of coordinated, multiple attacks across different cities in Saudi Arabia on the same day underscores the threat the kingdom faces from extremists who view the Western-allied Saudi monarchy as heretics and enemies of Islam.
Saudi Arabia is part of the US-led coalition fighting Isis in Iraq and Syria.
State-linked Sabq news and the Okaz newspaper also carried reports of the suicide attack.