U.S. administration and intelligence officials are concerned that Israel is planning a ground incursion into Lebanon that could be launched in the late spring or early summer if diplomatic efforts fail to push Hezbollah back from the northern border with Israel, CNN has quoted senior administrations officials and officials familiar with the intelligence as saying.

Austria's foreign minister on Thursday urged Israel and Lebanon's militant Hezbollah group against escalating the conflict along the volatile Israel-Lebanon border and expressed hope for a pause in the fighting in Gaza in time for the start of the Muslim holy month of Ramadan in March.

The Middle East has witnessed enough devastation and cruelty, said Alexander Schallenberg, speaking after meeting his Lebanese counterpart in Beirut.

Hezbollah fired Thursday volleys of Katyusha rockets at Eilon in northern Israel in response to the killing of two civilians in Israeli strikes, as warplanes raided Wednesday the towns of Siddiqin and Kafra, also injuring 14 people.

Hezbollah also attacked soldiers in Jal al-Alam with artillery shells, a gathering of Israeli troops on the Cobra Hill and an Israeli post in the occupied Shebaa Farms.

Israeli strikes killed two elderly people in Lebanon's south on Wednesday evening, while Hamas earlier fired a volley of rockets towards northern Israel from Lebanon amid escalating cross-border clashes in recent days.

Hezbollah, a Hamas ally, has exchanged near-daily fire with the Israeli army since war erupted between Israel and the Gaza-based Palestinian militant group in October, while Palestinian groups in Lebanon have also occasionally claimed attacks.

More than 120 individuals and groups on Wednesday called for a United Nations probe into Israeli attacks on journalists in south Lebanon, where three were killed last year.

An appeal addressed to U.N. rights chief Volker Turk expressed concern over "the Israeli forces' apparent deliberate targeting of journalists and media workers in Lebanon."

There will be no major war between Hezbollah and Israel despite the latest escalation, a Western diplomat has said privately to his interlocutors.

The military wing of Palestinian group Hamas on Wednesday said it fired a volley of rockets towards northern Israel from south Lebanon, amid escalating exchanges at the Lebanon-Israel border in recent days.

Hezbollah, a Hamas ally, has exchanged near-daily fire with the Israeli army since war erupted between Israel and the Gaza-based Palestinian militant group in October, while Palestinian groups in Lebanon have also occasionally claimed attacks.

Caretaker Defense Minister Maurice Slim on Wednesday said a newspaper distorted remarks voiced by him about the Lebanese Army’s preparedness.

Hezbollah and Israel exchanged fire Wednesday a day after a U.N. official called for an end to the "dangerous cycle of violence", as tensions increased on the border.

An Israeli airstrike targeted the house of Hezbollah commander Ali Wehbe in Bint Jbeil, while Israeli warplanes bombed Beit Leef, Ramyeh, Ainata and al-Khraybeh.

Operatives from Iran and Hezbollah are working inside Yemen to support Houthi insurgents' attacks on international shipping, a U.S. official said.

Tim Lenderking, the U.S. special envoy for Yemen, told a Senate subcommittee that Iran's clerical state was "equipping and facilitating" the Houthi attacks, which have triggered retaliatory U.S. and British strikes on Yemen.