Spain will immediately reopen its embassy in Tehran and has ordered its ambassador to return, Minister of Foreign Affairs Jose Manuel Albares said on Thursday.

The announcement came a day after the United States, Israel and Iran agreed upon a 14-day ceasefire.

Albares said Ambassador Antonio Sanchez-Benedito had been instructed to return to Tehran and resume embassy operations, which had been suspended on March 7 after US and Israeli air strikes.

"We want to contribute from all fronts, including from Tehran, to efforts for peace," he said.

Albares also called Israel's continued attacks in Lebanon, which he said risk undermining the ceasefire, "a disgrace."

Spain had evacuated its ambassador from Iran in early March after hostilities began.