Two of the three British teenagers who left the UK in February to join Islamic State in Syria have now been married off, according to the Guardian newspaper.

The newspaper reports that the two 15-year-olds are married to men from the terrorist group.

Shamima Begum, 15, Kadiza Sultana, 16, and Amira Abase, 15, all ran away from their families in February to join up with the radical terrorist group in Syria, according to the Guardian, which did not name the two teenagers that were married.

The teenagers were allowed by the terrorists to tell their families they were married and are living in Syria. Apparently the schoolgirls got a "catalogue" of men approved by ISIS to be wed, the Guardian reported.

The girls flew to Turkey in February while they were on break from school and then appeared to have crossed into Syria, the Guardian said.