V BBC's Frank Gardner:
'This is exactly the escalation in the simmering conflict between #Iran, its proxies and #Israel that everyone feared: a direct attack by one nation against another.
Israel has several layers of air defences and it has vowed to respond to any attack.
The risk now is that this tit-for-tat continues to escalate into a full-blown regional war, something most governments in the region have been trying hard to avoid ever since the #Hamas-led attack on Israel on 7 October.'