Baghdad: An Iraqi man hanged his 19-year-old daughter after discovering she had joined Al Qaida and was preparing to launch a suicide bombing, police said on Saturday.

"Al Najem Ambagui, a farmer aged 52, hanged his 19-year-old daughter Shakhla at his home 40 days ago because she had joined Al Qaida," said a police officer in Baquba, the capital of Diyala province.

The girl was "buried in a canal near his home in Mandali," he said on condition of anonymity.

"Prisoners of Al Qaida in Baghdad had confessed to investigators that they recruited Shakhla to carry out a suicide operation," the officer said.

Police had gone to arrest her at her Mandali home on Tuesday, but instead detained her father after being unable to find the daughter.

"After three days of interrogation, the father confessed to his crime and led us to where he had buried her," the officer said.