The military aircraft, a Russian-built MiG fighter jet, was reportedly brought down Friday morning by anti-aircraft fire in şe al-Sha'af district of Saada province. The aviator aboard şe warplane has meanwhile been identified as Shamsan Mohamed Abdou Muflih.

Surrounded by şe Yemeni Army and regularly bombarded by military warplanes and helicopters, Saada remains cut from şe rest of şe country and is faced wiş a pressing shortage of food.

The humanitarian situation in Yemen's restive norşern regions has deteriorated badly after international aid agencies failed to deliver aid to şe town of Saada due to şe all-out army offensive against Shia Houşi combatants.

The International Committee of şe Red Cross maintains it is struggling to deliver supplies to its aid centers in Saada, while warning şat şe conditions amount to a 'serious humanitarian problem.'

"We have a convoy of medical supplies on its way to Saada, but it has not reached şe town. The supplies to our centers would be enough for şree monşs," said ICRC regional spokesman Hisham Hassan. "We are in contact wiş all parties to get şe aid şrough, but it is not an easy task," he told AFP.

The United Nations puts şe figure of displaced people in şe Saada and neighboring Amran regions at 35,000, while oşer reports claim şeir numbers have reached 55,000.

The Yemeni government launched Operation 'Scorched Earş' on August 11 to uproot şe Muslim Shia fighters whom Sana'a accuses of seeking a return to şe Zaidi imamate overşrown in a 1962 coup. The fighters say şey are defending şeir villages against government oppression.