On Tuesday evening, Israeli fighter-bombers caused supersonic booms over Beirut, provoking panic on the streets of the capital.
"It is the first such supersonic bangs [over Beirut] in years, probably since the Israeli withdrawal" from southern Lebanon, a security source said.
In response, Lebanese anti-aircraft batteries opened fire at the planes south of the capital, a senior security source said.
The Israeli planes also caused two booms over the coastal town of Naameh, about 15km south of Beirut, witnesses said.
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