Widening a European counterterrorism dragnet, Greek authorities on Saturday detained four suspected jihadis including a man believed to be the ringleader of a Belgian militant cell.

A Greek police official said the four were arrested separately in Athens and included a man who matches the description of Abdelhamid Abaaoud -- who Belgian authorities suspect was behind a jihadi cell that was dismantled in Belgium on Thursday.

Greek officials initially thought Abaaoud was in Turkey, but the detained man's name, as well as the cellphone found on him matches descriptions that Greek police received from Belgium, the Greek official said.

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