The United States on Thursday imposed sanctions on four Hizbullah leaders for alleged operations in Syria and elsewhere in the Middle East.

The U.S. Treasury Department said the sanctions target senior members of Hizbullah responsible for activities including assisting fighters from Iraq to support the regime of President Bashar Assad in Syria, where civil war has raged for more than two years.

Israeli Prime Minister Benjamin Netanyahu warned on Thursday of retaliation after a volley of rockets were fired from southern Lebanon at the Jewish state, causing no casualties or damage.

"Anyone who harms us, or tries to harm us, should know -- we will strike them," he said in a televised address.

Unknown militants fired four rockets from the southern region of Tyre towards northern Israel on Thursday.

“Four rockets were fired from an area between Hawsh and the al-Rashidiyeh (Palestinian refugee) camp towards the Occupied Territories (northern Israel),” Lebanon's National News Agency reported.

Lebanese Forces leader Samir Geagea criticized on Thursday the United Nations Security Council's stand following the bloody massacre of the Reef Damascus town of Ghouta.

"What is shameful after Wednesday's massacre is the U.N. Security Council's dealing with it, despite its gravity and horror,” Geagea said in a released statement.

Hizbullah accused on Thursday “regional intelligence bodies” of being behind last week's deadly blast in Beirut's southern suburbs.

"This terrorist blast was engineered by intelligence bodies that are benefiting from the policies of incitement adopted by some March 14 factions,” the party's Loyalty to Resistance parliamentary bloc said after the MPs' meeting.

Progressive Socialist Party leader MP Walid Jumblat on Thursday said “all the conventional statements of condemnation and denunciation” are not enough regarding “the horrible scenes of the Ghouta massacre in Damascus' countryside that were broadcast by TV stations.”

“Meetings held here and there will remain futile without taking the necessary measures to change the grim situation that the regime has dragged Syria into with a cover from international and regional allies and amid the neglect of the West, which settled for drawing fictional red lines that have nothing to do with reality on the ground,” Jumblat said in a statement.

Three people from the Palestinian Ain el-Hilweh camp were charged on Thursday with belonging to an armed terrorist organization and of planning attacks in Beirut.

According to the state-run National News Agency, Judge Danny Zaenni also charged Lebanese Ghassan S., Ahmed B, and Ali H. with preparing bombs in Ain el-Hilweh to move them to other areas across Beirut.

Masked gunmen shot dead a Hizbullah supporter and two other men, including a member of the security forces, in the northern city of Tripoli early Thursday, a security official said.

"Masked men on motorbikes shot dead Hussam al-Mouri, a security official and a third man who happened to be at the scene," the official said.

The Civil Defense contained on Thursday a fire that erupted in a room on the third floor at Moarbes hospital in Ain el-Remeneh.

The blaze swept through the second floor, the third and part of the fourth floor, the state-run National News Agency reported.

The region of Wadi Khaled in the Bekaa came under shelling from the Syrian side of the border at dawn on Thursday, reported the National News Agency.

It said that several houses were damaged in the attack.