ISLAMABAD: As many as 11 suicide bombers entered Pakistan from Afghanistan for terrorism some 22 days ago, and two of them blew themselves up in Khyber Pakhtunkhwa recently, intelligence agency and police sources told Dawn on Wednesday.

According to the sources, the bombers were affiliated with Sajna Group of the Tehreek-i-Taliban Pakistan.

The information about them and their entry in the country was gathered by the Intelligence Bureau (IB) and shared with the authorities concerned, they added.

“They may strike in the Punjab, especially in Rawalpindi, Islamabad and Lahore,” the sources revealed.

The agency has advised the authorities concerned to improve security in and around hospitals, shopping centres, markets, parks, food streets and malls to prevent any terrorist activity, the officials added.

A senior police officer on condition of anonymity told Dawn that after the intelligence report security of sensitive locations had been strengthened. Intelligence agencies have kept an eye on slums and rural areas for possible presence of terrorists, he added.

“An information-based operation is being conducted by agencies and Rangers in these areas,” he added.

Published in Dawn, April 28th, 2016