Iran’s capital was rocked by a massive explosion Sunday as Israel said it would carry out "non-stop strikes” against its leaders and military.

Iran, meanwhile, fired more missiles at Israel and Gulf Arab states in retaliation for the killing of its supreme leader in the surprise U.S. and Israeli attack that launched the widening war.

The blasts in Tehran – whose target was not immediately clear – sent a huge plume of smoke into the sky in an area where there are government buildings.

Iranian authorities say more than 200 people have been killed since the U.S. and Israeli bombardment began.

Loud explosions caused by missile impacts or interceptions could be heard in Tel Aviv. Israel’s rescue services said eight people were killed and 28 wounded in a strike in the central town of Beit Shemesh.