Sri Lanka, April 19 -- Pakistan has placed its capital Islamabad and the neighboring garrison city of Rawalpindi on high security alert ahead of the expected second round of U.S.-Iran talks.

According to police sources, some 20,000 police personnel, supported by hundreds of elite commandos, including snipers, have been deployed on security duty across the twin cities.

Additional Punjab Highway Patrol, Dolphin Force and Quick Response Unit teams have also been placed on alert, while Safe City cameras and rooftop snipers are maintaining round-the-clock surveillance.

Similar arrangements were made before the first round of peace talks between the United States and Iran aimed at easing recent hostilities in the Middle East.

Security offic...