The detention hearing of terror suspect David Coleman Headley, arrested by the FBI for plotting attacks in India at the behest of Lashkar-e-Taiba, scheduled for Friday at a court in Chicago has been indefinitely deferred. US Attorney’s Office, Northern District of Illinois, announced that no new date has been fixed for the hearing.Headley's hearing was scheduled before US Magistrate Judge Arlander Keys. His lawyer John Theis was not available immediately for comment.The Attorney's office further said the detention hearing for Tahawwur Hussain Rana, also in custody on similar terror charges, would proceed as per schedule tomorrow.Rana and Headley, arrested by the FBI in October for plotting terror attacks in Denmark and India, are also under investigation for possible links to the 26/11 terror strikes in Mumbai last year that killed 166 people.