Israeli jets have bombed a target south of Beirut a day after rockets were fired from Lebanon into Israel.
They targeted a "terror site" near the coastal town of Naameh, between Beirut and Sidon, the Israeli military said.
The Popular Front for the Liberation of Palestine-General Command (PFLP-GC) said one of its bases had been hit.
But the group denied any involvement in Thursday's rocket attack into Israel. Neither incident caused casualties or much damage.
The Israeli military, in a statement, said its air force "targeted a terror site located between Beirut and Sidon in response to a barrage of four rockets launched at northern Israel yesterday".
"The pilots reported direct hits to the target," the statement said, according to AFP news agency.
PFLP-GC spokesman Ramez Mustapha confirmed the group's base at Naameh was targeted by Israeli war planes at around 04:00 local time (01:00 GMT) "without causing any victims or damage".
The PFLP-GC, a Palestinian group known to support Syrian President Bashar al-Assad, denied it fired any rockets into Israel.
Al-Qaeda linked militant group, the Abdullah Azzam Brigades, said it carried out the attack.
The four rockets were fired from the Tyre region of southern Lebanon.
They caused some minor damage at a kibbutz near the Israeli coastal town of Nahariya.
An Israeli military spokesman said one of the rockets was intercepted by the Iron Dome missile defence system.
Rockets have been fired from Lebanon into Israel intermittently by militant groups since the Israel-Hezbollah conflict in 2006.
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