Emirati air defense system downed by mistake a Saudi helicopter over  the Yemeni city of Marib, according to Local sources.

The sources added that 12 Saudi officers and three staffers on board were killed after a rocket struck the helicopter, branded Black Hawk.

Yemen has been since March 26, 2015 under brutal aggression by Saudi-led coalition.

Thousands have been martyred and injured in the attack, with the vast majority of them are civilians.

Riyadh launched the attack on Yemen in a bid to restore power to fugitive ex-president Abd Rabbu Mansour Hadi who is a close ally to Saudi Arabia.

Source: Al-Manar Website