KARACHI: Police have registered a case against three suspected terrorists over a police encounter on Monday.

The FIR, lodged at the Counter Terrorism Department, was registered on the complaint of SHO Sohrab Goth. Suspected terrorists Sarosh Siddiqui, Muzammil and Mohammad Talha have been nominated as the suspects.

On Monday, police raided a house in Scheme 33, Rufi Bungalows, Kaneez Fatima Society on a tip-off about the presence of militants. However, the militants present inside opened fire on the raiding party, killing one police official and injuring another. The suspected terrorists also managed to escape from the scene.

Karachi police claim killing TTP chief Fazlullah's cousin in shootout

Police are searching for suspected terrorist Sarosh Siddiqui, who escaped after killing a policeman during raid earlier today

Police said Siddiqui, a senior figure of militant outfit Ansarul Shariah, was among those who escaped. 

Siddiqui is said to be the mastermind of the Eid-day attack on Khawaja Izharul Hassan, the opposition leader in the Sindh Assembly. 

Later in the day, police teams, led by Malir SSP Rao Anwar, conducted raids across the city, nabbing around a dozen people.

The raids also resulted in another shootout, in which SSP Anwar claimed the death of four suspected terrorists, including a cousin of Tehreek-e-Taliban Pakistan chief Mullah Fazlullah.

Speaking at Geo Pakistan Tuesday morning, Geo News Karachi Bureau Chief Fahim Siddiqui said Ansarul Shariah is a relatively new, mostly Karachi-based outfit; formed by former members of Daesh and other banned groups.

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The outfit is influenced by Al Qaeda's Osama bin Laden and Ayman al-Zawahiri, security sources say

He said most of its cadres left for Syria to fight in the civil war but returned when the fighting intensified, adding that most of them are thus 'battle hardened'.

The group first made headlines in Karachi in April this year in the targeted killing of a retired army colonel. 

Police officials also believe the group is behind several attacks on police officials in Karachi in the past few months.

Siddiqui also revealed that most of the group?s members come from ?educated backgrounds?.