Four youths suspected to be having links with terror outfit Islamic State, IS were detained in Kerala. They arrived from Abu Dhabi early today and are being questioned. <br/><br/>PTI quoting sources said, two of them arrived at Karipur airport and the other two at Thiruvananthapuram early today and were being interrogated by the state intelligence officials.<br/><br/>The four had been reportedly deported for their alleged terror links. One of the youths being questioned today is the relative of the youth let off earlier.<br/><br/>