Israeli warplanes carried out a series of airstrikes deep inside Lebanon on Sunday, targeting Hezbollah facilities where the militant group was allegedly operating, the Israeli army announced.

The military said the strikes hit rocket launchers and other weapons used by Hezbollah, accusing the group of violating existing understandings between Israel and Lebanon.

"The activity of terror operatives at these sites is a violation of the understandings between Israel and Lebanon," the Israeli army said in a statement.

Lebanon’s state-run National News Agency reported that Israeli aircraft launched three airstrikes in the Bekaa Valley, in the east of the country. Two of the strikes hit the outskirts of the town of Harbata, while a third targeted the town of Halbata, in the northern Bekaa region, the agency said.

The strikes come just two days before a deadline in an already fragile ceasefire between Israel and Hezbollah, raising concerns over the potential for renewed escalation.