The nurses were taken in buses from Tikrit to Mosul by a team of the Sunni insurgents Thursday.
The nurses reached Mosul at around midnight India time.
“They are safe and have been kept in two rooms which has only one door,” a source close to the nurses told IANS.
The nurses were provided food and water by their escorts.
The militants have now adopted a “tough” attitude towards the nurses, the source added.
The Sunni militants were pleasant tempered towards the nurses Thursday but “are now displaying a tough attitude”, the source added.