A US-flagged plane carrying 11 people to Baghdad crashed in the desert on Monday, killing all 10 on board, local officials said.
The Airbus A320-200 crashed at dawn in a sand dune, officials in the northern province of Salahuddin said.
The plane was carrying nine Iraqis, including three children, from the Iraqi city of Tikrit, according to the provincial governor.
It crashed near a residential area of Salihuddin, about 120 kilometres (75 miles) south of Baghdad, officials said in a statement.
The cause of the crash was under investigation, but Iraqi media reported that it may have been a bomb or a missile.
Iraqi state television said a bomb hit the plane, but the ministry of interior denied that.
A military source told AFP news agency that the bomb had not been found on board the plane.
The Airbus was on its way from the capital Baghdad to the city of Basra, where it was to be used by Iraqi security forces.
It was not immediately clear how the plane had come under attack.
In 2014, Iraq’s military captured large swathes of Iraq from the Islamic State of Iraq and the Levant (ISIL) group, and the group was quickly expelled from the country.
The country was recaptured by Iraqi forces in June.