India, March 2 -- Iran vowed revenge Sunday after the killing of its supreme leader and traded strikes with Israel as part of a widening war prompted by a surprise US and Israeli bombardment a day earlier.

Blasts in Tehran 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 start of the US and Israeli strikes that killed Ayatollah Ali Khamenei and other senior leaders.

Earlier, Iran fired missiles at an ever-widening list of targets in Israel and Gulf Arab States in retaliation while Israel pledged "non-stop" strikes against Iran's leaders and military.

In Israel, loud explosions caused by missile impacts or interceptions could ...