AMMAN: Jordan summoned Tehran's ambassador on Wednesday to protest weekend attacks on Saudi missions in Iran that set off a diplomatic crisis.

Amman expressed its "strong condemnation" of Saturday's attacks by protesters on the Saudi embassy in Tehran and its consulate in Iran's second city Mashhad, a foreign ministry spokesman told official news agency Petra.

"The attacks on the Saudi embassy and consulate constitute a flagrant violation of international conventions," the spokesman said.

Saudi Arabia and some of its Sunni Arab allies cut diplomatic ties with Iran following the attacks, carried out by protesters angry at Riyadh's execution on Saturday of prominent Shiite cleric and activist Nimr al-Nimr.

The dispute between the Middle East's main rival Sunni and Shiite powers has raised widespread concerns of greater regional instability.

Jordan, which is mainly Sunni and has close ties with Saudi Arabia, also condemned what it said was Iran's "interference in Arab countries' internal affairs," the spokesman said.