Story highlights Parent company of security service company Sallyport says men were not employees

Gunmen grabbed the men Friday in Baghdad's Dora neighborhood, a source says

The men were identified as two Iraqi-Americans and an Egyptian-American

(CNN) A sweep of a Baghdad neighborhood is underway in the search for three American contractors missing in Iraq, U.S. and Iraqi officials said.

The three men were kidnapped from a Baghdad apartment known to be a brothel, an Iraqi security official with knowledge of the investigation told CNN.

Investigators were trying to determine whether the men had been lured to the brothel or the kidnapping was opportunistic, the Iraqi official said.

The men were identified as two Iraqi-Americans and one Egyptian-American.

The missing men work for a security service company called Sallyport, the Iraqi official said. However, a spokesman for Michael Baker International, Sallyport's parent company, said the report was false.

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