Two Israeli Defense Force-Air Force F-15I Ra'am aircraft.

A spokesman for the rebel military in Syria has said that Israeli Air Force jets were spotted flying over Syrian President Bashar al-Assad’s palace in Damascus as well as over security and military installations, according to Israel’s Channel 2.

The planes were spotted Sunday morning, the spokesman said. He added that no anti-aircraft shots were fired at the jets.

Last week several Western nations, as well as the rebel army, confirmed that evidence suggesting that chemical weapons had been used by Assad’s regime had been gathered. The use of chemical weapons by Assad, considered a “red line” by U.S. President Barack Obama and Israel, have ratcheted up tensions even further in the region.