Two unmanned aerial vehicles (UAVs) belonging to Saudi Arabia have been downed in Yemen, according to military sources in the Arabian Peninsula country.

The sources said that two drones, used for espionage activities, were shot down by the Yemeni army’s air defense forces on Sunday, al-Masirah news netword reported.

They noted that the first drone was downed by the Yemeni forces in al-Aqaba area in Jawf province and the second one was targeted in al-Fariza military base in Jizan province.

The news came days after a Jordanian F-16 warplane was shot down by the Yemeni forces.

Saudi Arabia claimed that the fighter jet crashed because of technical reasons.

This is while Saudi Arabia’s invading aircrafts are repeatedly targeted by the Yemeni army and forces of the Houthi Ansarallah movement. The monarchy, however, depicts the crashes as accidental.

Back in March, two Emirati pilots were killed when their warplane crashed in Yemen due to what the Saudi-led coalition called a “technical fault”.

Saudi Arabia has been conducting deadly airstrikes against Yemen since Marchi 2015 in a bid to reinstall the former Yemeni president, Abd Rabbuh Mansur Hadi, who is a close Riyadh ally.

The airstrikes have claimed the lives of 10,000 Yemenis and left 40,000 others wounded.