The Iran-backed Hezbollah signalled on Friday it would escalate attacks on Israel in response to the deaths of 10 Lebanese civilians killed in Israeli attacks this week, saying Israel would pay a price "in blood".
Hezbollah and Israel traded rocket and missile fire in areas near the Lebanese-Israeli border on Saturday, officials on both sides said, in the latest flare-up of violence which the US worries will cause conflict to spiral in the Middle East.