A mysterious device reportedly containing Hebrew writing was discovered by authorities in southern Lebanon near the border with Lebanon Saturday, the country’s state-run news agency reported.

A statement from the Lebanese Army, carried by the National News Agency, reported that an Indonesian unit serving in the international peacekeeping body UNIFIL found the device near the town of Adaisseh, Lebanon.

“An Army patrol immediately arrived at the scene and examined the detected body, which turned out to be composed of 2 computer devices carrying Hebrew letters,” the statement read.

An earlier report said a spying device had been uncovered near a tree in the town, which lies just 150 meters from the border fence with Israel.

Israeli troops massed in nearby Misgav Am as the UNIFIL unit deployed to the area across the fence, according to a report in Lebanon-based Naharnet.

Lebanon has accused Israel of planting listening devices in southern Lebanon before and last month acting Foreign Minister Adnan Mansour filed an official complaint with the United Nations over Israeli spying, which he said was a “continuous aggression against the Lebanese territory, the people and the security and military forces.”

The Lebanese Army said it had launched an investigation with UNIFIL ” to determine the incident circumstances.”

There was no immediate response from Israeli officials.