Baghdad (CNN) -- Two U.S. service members were killed Friday during operations in southern Iraq, the U.S. military said Saturday.
The military is withholding the names of the two until next of kin have been notified. There were no details on how and precisely where the incident occurred.
The number of service members to die in Iraq this year now stands at 20.
Although the U.S. combat mission in Iraq officially ended last year, around 47,000 troops are expected to remain in the country until the end of the year to train, assist and advise their Iraqi counterparts.
Navy Adm. Mike Mullen, chairman of the U.S. Joint Chiefs of Staff, said Friday that Iraqi officials have not asked the Obama administration to push back the withdrawal deadline.
Any discussion about a change in the timetable would be considered, he indicated, but would need to begin soon.