Israeli tank fire hit six areas in southern Lebanon on Thursday and the Israeli military said its ceasefire with Hezbollah was breached after what it called suspects, some in vehicles, arrived at several areas in the southern zone.
A ceasefire between Israel and Hezbollah took effect on Wednesday under a deal brokered by the US and France, intended to allow people in both countries to start returning to homes in border areas shattered by 14 months of fighting.
The Israeli military had urged residents of towns along the border strip not to return yet for their own safety.
On Thursday morning, Israeli tank fire hit six areas within that border strip, state media and Lebanese security sources said.
The rounds struck Markaba, Wazzani and Kfarchouba, Khiyam, Taybe and the agricultural plains around Marjayoun, all of which lie within two kilometres of the Blue Line demarcating the border between Lebanon and Israel. One of the security sources said two people were wounded in Markaba.
Lebanese families displaced from their homes near the southern border have tried to return to check on their properties but Israeli troops remain stationed within Lebanese territory in towns along the border and Reuters reporters heard surveillance drones flying over parts of southern Lebanon.
There was no immediate comment on the tank rounds from Hezbollah or Israel, who had been fighting for over a year in parallel with the Gaza war.
Under the ceasefire terms, Israeli forces can take up to 60 days to withdraw from southern Lebanon but neither side can launch offensive operations. Israeli Prime Minister Benjamin Netanyahu said he had instructed the military not to allow residents back to villages near the border.
Lebanon's speaker of parliament Nabih Berri had said on Wednesday that residents could return home.