SIDON, Lebanon: The Israeli Army set up Saturday new posts for additional tanks along the border with Lebanon, security sources told The Daily Star.

Residents near the village of Ruweisat Al-Alam, which is located in the occupied Kfar Shuba Hills, said they saw three Israeli tanks guarding a bulldozer that was digging up earth and erecting a 6-meter high sandbag wall.

Lebanese security sources said the Lebanese Army was monitoring the work of Israel along the border, adding that the sandbag walls are often built for tank positions.

Ruweisat Al-Alam is one of three towns that Israel claims are part of Palestinian territories.

The security sources added that the United Nations Interim Forces in Lebanon (UNIFIL) are also monitoring the situation.

Israel has in the past crossed over from Ruweisat Al-Alam into Lebanon and kidnapped local shepherds only to return them a few days later.

The Lebanese Army and Hezbollah have been on alert in recent days, particularly given the increase of areal activity by the Israeli Air force, the security sources said.

The over flights are violations to U.N. Security Council Resolution 1701, which brokered an end to the hostilities of the 2006 war between Lebanon and the Jewish state, the sources said.

In January, Israeli jets raided a target in Syria which the U.S. claims was a weapons convoy. Days after the incident, Damascus claimed Israeli rockets hit a research facility near the capital, Damascus.