Iran has claimed that three of its Su-24 fighter jet pilots have been held by Qatar for six months after their aircraft were shot down during the war earlier this year. In a letter to the International Committee of the Red Cross (ICRC), Tehran appealed for the pilots' release, alleging they have been denied contact with their families.The revelation comes a month after Iran announced it had recovered the body of another pilot killed during the attack on Qatar's Al Udeid Air Base, the largest US military base in the Middle East. Qatar had previously said its air force shot down two Iranian Su-24 fighter jets while intercepting missiles and drones during the attack.