Two explosions at the Iranian embassy in Beirut have killed 23 people and injured 146, Lebanon's health minister has said.

Ali Hassan Khalil said the number of victims, which include the cultural attaché of the embassy, was not final and could rise further.

Lebanese officials say security footage showed a suicide bomber and car bomb were behind the blasts in the neighbourhood of Janah, in the south of the Lebanese capital.

The area is a stronghold of the militant Hizbollah group, which is a main ally of President Bashar al-Assad in neighbouring Syria's civil war. It is unclear if the blasts are related to that conflict.

State television in Syria said "The Syrian government firmly condemns the terrorist attack carried out near the Iranian embassy in Beirut. Iran accused Israel of being responsible for the attacks.

The bombings were "an inhuman crime and spiteful act done by Zionists and their mercenaries," ministry spokeswoman Marzieh Afkham said in remarks reported by the official IRNA news agency.

Al Qaeda-linked group the Abdullah Azzam Brigades has claimed responsibility for the attack.

The neighbourhood has been hit by several blasts in recent months that have killed and wounded scores.

Shi'ite Iran has been bankrolling the fight by Mr. Assad against the mainly Sunni rebels and has given military support.

Southern Beirut is known as a Hizbollah stronghold and has been hit by at least three other explosions this year.

Those attacks were blamed on groups linked to the rebels, believed to be in retaliation for its involvement in Syria's civil war.

Hizbollah fighters have been supporting the forces of Mr. Assad in several strategic battles across Syria - a move that has also increased sectarian tension in the two countries.