Six teams of sniffer dogs, armed personnel carriers, bomb disposal squads and commandos participated in the operations in the capital on Saturday, the Dawn reported.
Officials of Capital Territory Police, Pakistan Rangers, and intelligence agencies also recovered arms and ammunition.
"These were intelligence-based operations conducted in view of the fresh threats from militants after the execution of two convicted terrorists," the paper said, citing a police official.
Afghan refugee settlements, bus terminals and under-construction buildings were also searched for terrorists. Officials said that educational institutions were now targets, forcing the authorities to close all school and colleges in the capital from Monday.
One of the alerts was related to a military installation and stated that militants wearing uniform of the military may attack the facility from the Margalla Hills side. Another alert was also issued for foreign missions and diplomats.
The police also started air surveillance of sensitive installation which was under threat.
A sky-cam of the district administration was being utilised to keep an eye on the routes the terrorists might use to reach the installation. A proposal is being drafted for immediate release of funds from the government to purchase sky cams for the surveillance of the sensitive Diplomatic Enclave and its surrounding areas.
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