Special Cell of Delhi Police moved an application before Additional Sessions Judge Daya Prakash, saying they require 20 days time to conclude the probe as suspected top IM operative Zia-ur-Rehman alias Waqas was arrested on March 22 and they need to quiz him to establish the "missing links".
"He (Waqas) has to be arrested in this case. With the arrest of this wanted terrorist, the missing links in the conspiracy are likely to be established which requires that period of investigation and judicial custody of these accused persons (Yasin and Akhtar) be extended," the police said.
The police also claimed that Yasin had prepared the pressure cooker bomb which was fitted in the car parked outside the Jama Masjid on September 19, 2010.
"The material used to prepare circuits/timer fitted in the IED (improvised explosive device) was purchased by Ahmad Siddibappa (Yasin) and Asadullah Akhtar from Lajpat Rai market in Delhi," it said.
It also informed the court that efforts were being made to arrest the absconding accused, including IM co-founders Riyaz Bhatkal, Iqbal Bhatkal and top IM operative Amir Raza Khan.