UPDATE 1:40 pm IST: Iraqi police on Monday confirmed that three Americans had gone missing in Baghdad but refrained from saying if it was a case of abduction.
"We have no clear indication about the circumstances of their disappearance," a senior police officer told Reuters.
The local police had set up checkpoints around the neighbourhood from where the three people had gone missing, the agency reported.
Several Americans have been kidnapped in Baghdad, the United States Embassy in the Iraqi capital has reportedly said.
Three American contractors, two of whom were Iraqi-American citizens, were abducted by gunmen from the Dora neighbourhood in Baghdad on Friday and taken away in a convoy, CNN reported, citing a security official.
US officials did not specify the number of individuals who went missing, but said "several" have been kidnapped, according to BBC.
"We are working with the full cooperation of the Iraqi authorities to locate and recover the individuals," US State department spokesman John Kirby said in a statement on Sunday.
No group has claimed responsibility, though the Islamic State is known to carry out abductions in Iraq.
Isis had carried out a deadly attack at a shopping mall in Baghdad last week, killing at least 18 people.