New Delhi, Feb 12 (IANS) A city court Friday extended the police remand of suspected Indian Mujahideen (IM) terrorist Shahzad by six days for a further probe into his alleged role in the September 2008 serial blasts in the national capital.

Metropolitan Magistrate Hemraj sent Shahzad for custodial interrogation till Feb 18.

The IM suspect, also an accused in the Batla House encounter in which a Delhi Police inspector was killed Sep 19, 2008, was sent to judicial custody till Feb 20 in that case. Police claimed Shahzad escaped from Batla House in south Delhi where suspected IM terrorists were holed up.

The Crime Branch of police had submitted that it did not require him for further interrogation in the shootout case.

Earlier, the court had remanded Shahzad, who was arrested from Azamgarh on Feb 1 by Uttar Pradesh's Anti-Terrorism Squad, to three days' police custody.

Five synchronised blasts - two in Connaught Place, two in Greater Kailash and one in a crowded market in Karol Bagh - occurred within a span of 31 minutes on Sep 13, 2008. Twenty six people were killed and over 150 were injured.