US soldier killed in northern Iraq blast

A US soldier was killed in a bomb blast in northern Iraq on Thursday, officials said, as Iraqi forces in the region continued their push on retake Mosul from the Islamic State group.

US defence officials did not immediately identify the service member, or say whether he or she was one of the more than 100 US troops advising Iraqi security forces and Kurdish peshmerga as they advance toward Mosul.

The US-led coalition fighting IS said in a statement that further information would be released "as appropriate" - additional details often depend on when family members are notified of the death.

An unnamed US official cited by CNN said the service member was airlifted off the battlefield but later died from the wounds.

No other US troops were wounded, CNN said.

The death is the fourth time a US military member has been killed in combat in Iraq since operations against IS began there in 2014.

In May, Navy SEAL Special Warfare Operator 1st Class Charles Keating was fatally shot during a pitched battle with IS near the village of Tal Asquf, north of Mosul.

In April, Staff Sergeant Louis Cardin was killed by an IS rocket attack that also wounded eight Marines at an artillery position in the Makhmur area of northern Iraq.

And in October last year, Master Sergeant Joshua Wheeler, an American special operations soldier, was killed during a joint raid with Kurdish forces against IS in Hawijah, a northern Iraqi town.

Agencies contributed to this report.