Israel, Hezbollah exchange strikes along Lebanon border

The leader of Lebanon's Hezbollah said on Thursday the mass bombing attack against it using its communications devices was a "severe blow" and said Israel had crossed a "red line".

But he said the group would continue its daily strikes into northern Israel, vowing Israelis would not be able to return to their homes there until the Gaza war ends.

As Hassan Nasrallah spoke in a televised speech from an unknown location, Hezbollah and the Israeli military traded new strikes over the border and at least two Israeli soldiers were killed.

Israeli warplanes also flew low over Beirut and broke the sound barrier, scattering birds and prompting people in houses and offices to quickly open windows to prevent them from shattering.

Fears are rising that 11 months of exchanges of fire between the two sides will escalate into all-out war, particularly after this week's unprecedented bombings widely blamed on Israel in which hundreds of pagers and walkie-talkies used by Hezbollah were remotely detonated in Beirut, parts of Lebanon and the Syrian capital Damascus.

At least 37 people were killed and some 3,000 wounded in the explosions, which appeared to be the culmination of a months-long operation by Israel to target as many Hezbollah members as possible all at once, but which also hit civilians.