Residents of Lebanon's Ain al-Helweh Palestinian refugee camp described their fear and astonishment a day after a deadly strike that Israel said targeted a Hamas compound, a claim the Palestinian militant group rejected.

Tuesday night's raid, which Lebanese authorities said killed 13 people, was the worst since a ceasefire took effect last year between Israel and Hezbollah.

The Israeli army launched strikes on four south Lebanon towns on Wednesday, claiming it was targeting "Hezbollah infrastructure" after warning civilians of the impending raids.

The strikes came a day after 13 people were killed in an Israeli strike on a Palestinian refugee camp in south Lebanon -- the worst raid since a ceasefire took effect last year between Israel and Hezbollah.

Hezbollah, in a statement issued Wednesday, condemned in the strongest terms what it called "the horrific massacre perpetrated by the criminal Zionist enemy last night in the Ain al-Helweh camp in Sidon,” which resulted in the death of thirteen Palestinian refugees and a large number of wounded.

“The attack targeted a densely populated area filled with innocent civilians and children, in a yet another brutal act added to the enemy's dark record of crimes and genocide against Palestinians, Lebanese and the peoples of the region," Hezbollah said.

Speaker Nabih Berri on Wednesday called for seeking an urgent U.N. Security Council session over Israel’s attacks in Lebanon.

Commenting on the airstrike that targeted the southern town of al-Tiri earlier in the day and wounded a number of school and university students, Berri decried that Israel considers itself above accountability, lamenting that Lebanon is being condemned and criticized despite “its commitment to Resolution 1701 and the November 2024 cessation of hostilities agreement.”

President Joseph Aoun on Wednesday called Army Commander General Rodolphe Haykal and offered condolences over the two soldiers who were killed Tuesday in clashes with drug barons in Baalbek’s al-Sharawneh neighborhood.

“Once again, the army is paying with the blood of its men to protect Lebanese society from the scourge of drugs on the one hand, and to enforce the law on the other. Yesterday's two martyrs have joined a long line of comrades who sacrificed their most precious possession in fulfillment of their oath, reaffirming the military institution's determination, in cooperation with other security forces, to continue enforcing the law, pursuing perpetrators, and curbing crime in all its forms,” Aoun said.

Former Progressive Socialist Party leader Walid Jumblat voiced Wednesday his support to Lebanese Army chief Rodolphe Haykal after U.S. senators harshly criticized him.

A scheduled visit of Haykal to the U.S. was cancelled Tuesday after U.S. Senator Lindsey Graham posted on the X platform that Haykal is "a giant setback for efforts to move Lebanon forward because of a reference to Israel as the enemy and his weak almost non-existent effort to disarm Hezbollah."

Two soldiers were killed on Tuesday night in a clash between the army and wanted drug dealers in the Sharawneh neighborhood of Baalbek.

Three other soldiers were wounded during the clashes and the wanted drug dealer, who fired at the army, was killed.

The Israeli military said Wednesday it had killed two Hezbollah members in strikes the previous day in south Lebanon, where Israel has carried out repeated attacks despite the ceasefire.

The Israeli military said in a statement it had "struck and eliminated two Hezbollah terrorists in the areas of Bint Jbeil and Blida in southern Lebanon" on Tuesday.

One person was killed Wednesday in an Israeli strike on a car in the southern town of al-Tiri.

Eleven other were wounded in the strike, the health ministry said, as a school bus with students on board was passing near the targeted car.

Lebanon said an Israeli strike on Tuesday night on a crowded Palestinian refugee camp in the country's south killed at least 13 people, as Israel said it struck a Hamas compound.