The US has indicated it is open to backing an Israeli offensive against Hezbollah in Lebanon, amid mounting frustration that the group continues to link a truce with Israel to an elusive broader ceasefire in Gaza.

In his meetings in Beirut on Tuesday, US envoy Amos Hochstein delivered “blunt” warnings to Lebanese officials that Israel is preparing to launch a limited offensive on Hezbollah and will have the US’s support if a diplomatic solution isn’t found, a senior Arab official told Middle East Eye.

Hochstein met with Lebanese Prime Minister Najib Mikati and Speaker of Parliament Nabih Berri on Tuesday, both of whom the US has used as intermediaries with Hezbollah, the Iran-backed group the US designates a terrorist organisation.

Hochstein told Lebanese officials that Israel anticipates roughly five more weeks of intense fighting in Gaza, after which it will pause its main offensive across the enclave. However, it will continue to target senior Hamas officials and conduct attacks to recover hostages.

The Israeli military said on Tuesday night that it had approved plans for an offensive in Lebanon. Earlier in the day, Israel launched strikes on Hezbollah drone launch squads, the Israeli military said.

“The US will stand by Israel and not condemn them publicly if it launches an offensive against Hezbollah,” Hochstein warned the Lebanese officials, according to the Arab official.