The coalition has confirmed the loss of the plane, according to a statement carried by Saudi state news agency SPA.
Meanwhile, the Saudi-led coalition fighting in Yemen announced that two pilots were evacuated from operations area following a joint search and rescue operation implemented after their fighter jet crashed due to a technical failure. Two pilots from the aircraft ejected before it hit the ground.
Saudi officials don't appear to want to admit to a shoot-down, however, and rather say that the plane crashed on its own do to some as-yet-unspecified "technical fault".
The Tornado is a British-made warplane from BAE Systems, initially introduced in the 1980s and still in use mostly in Western Europe.
The Saudi-backed Yemeni army aborted several attempts by Houthi rebels who repeatedly attempt to make overnight infiltration into the government-controlled provinces in the country's southern part. Lowcock said he remained deeply concerned by the deterioration in the humanitarian situation in the country although there has been progress in the past month in opening Yemen's critical Red Sea ports to commercial fuel and food shipments, as well as the resumption of humanitarian shipments and flights.
Over 12,000 Yemenis, including thousands of women and children, have lost their lives in the deadly military campaign.
Shiite rebels in Yemen, known as Houthis, have previously aimed missiles at Saudi Arabia.
Riyadh, which is also witnessing a massive shake-up inside the regime, blames Iran, a strong backer of Houthi rebels and a regional rival of Riyadh, for supplying Houthis with arms. At least 10,000 people have been killed.