According to hospital officials, most of those killed and wounded in the Kohat attack had been doing what at the time of the blast?

Explanation: Senior rescue official Bilal Faizi said that most of the dead and wounded in the Kohat attack had been attending prayers at the mosque located within the Police Lines compound, explaining the unusually high civilian and police casualty count for an attack on what was primarily a security installation. The timing of the attack during Friday congregational prayers maximised the number of people present at the site, a pattern seen in several previous attacks on security-linked mosques in Pakistan.