KARACHI- Karachi Police Chief, Ghulam Qadir Thebo constituted an inquiry committee to probe into the terrorism incident at Karachi airport. The inquiry committee was led by Deputy Inspector General (DIG) Karachi East, Munir Ahmed Shaikh. Committee also included Senior Superintendent of Police (SSP) East Zone, SSP Malir, Special Investigation Unit (SIU), Deputy Superintendent of Police (DSP) airport and Station House Officer (SHO) airport. Intelligence agencies also conducted raids and took four people into custody. The four were suspected of selling mobile phone SIMs to the terrorists involved in Karachi airport attack. The people withheld by agencies were the employees of the mobile companies and were shifted to an undisclosed location for interrogation. Yesterday, First Information Report (FIR) of the attack on Karachi’s international airport was registered against the outlawed Tehrik-i-Taliban Pakistan (TTP), under the Anti-Terrorism Act, nominating the top brass of the banned militant outfit including its spokesman Shahidullah Shahid. Earlier, Islamic Movement of Uzbekistan (IMU) had also claimed responsibility of Karachi airport attack. The involvement of IMU in Karachi airport attack gave a new turn to the investigation conducted by the intelligence agencies.