The Lebanese army announced Sunday that an Israeli drone breached Lebanon’s airspace and dropped incendiary material in the South.
The material was dropped above Bastra Farm and caused a fire in a forest on the border.
The army said it was following up on the development with the United Nations Interim Force in Lebanon (UNIFIL).
The Israeli military said: "A short while ago, fires broke out in the Lebanese border area. The fires originate with operations by our forces in the area."
Tensions between Lebanon and Israel have been high throughout the week after two suspected Israeli drones went down in Hezbollah’s stronghold in Beirut’s southern suburbs on August 25.
The Lebanese army and Iran-backed Hezbollah said one exploded and one crashed, causing damage to Hezbollah’s media center.
A security official in the region has described the target of the drone strikes as linked to precision-guided missile projects.
Hezbollah has vowed to retaliate.
On Saturday, the Israeli military said it had ordered extra forces to deploy its northern command.