Jan 9 (Reuters) - The head of Iran's of Civil Aviation Organisation on Thursday denied "illogical rumours" that a Ukrainian airliner that crashed near Tehran had been hit by a missile, the semi-official news agency ISNA reported. "Scientifically, it is impossible that a missile hit the Ukrainian plane, and such rumours are illogical," ISNA quoted Ali Abedzadeh as saying.
U.S. officials said on Thursday that the plane had most likely been brought down accidentally by Iranian air defences. Ukraine outlined four potential scenarios to explain the crash, including a missile strike and terrorism. (Writing by Parisa Hafezi; Editing by Kevin Liffey)