Iran's Supreme Leader Ali Khamenei thanked the country's armed forces for their operation against Israel, and urged them to "ceaselessly pursue military innovation and learn the enemy's tactics," Iran's official news agency reported on Sunday.

Tehran openly targeted Israel for the first time on April 13 with more than 300 missiles and drones in what it said was retaliation for Israel's suspected deadly bombing of its embassy compound in Damascus on April 1.

"How many missiles were launched and how many of them hit their target is not the primary question, what really matters is that Iran demonstrated its will-power during that operation," Khamenei said on Sunday.

Early on Friday, explosions echoed over the Iranian city of Isfahan in what sources said was an Israeli attack, but Tehran played down the incident and said it had no plans for retaliation - a response that appeared gauged towards averting region-wide war.

(Reporting by Dubai Newsroom; editing by Barbara Lewis)