The mountainous region between Pakistan and Afghanistan, where Al Qaeda chief Osama bin Laden is believed to be hiding, will soon be under 24-hour surveillance.

US forces will soon implement high-tech surveillance tactics in area to nab the Al Qaeda chief, CNN reported on Thursday.

"We are putting the pieces in place to throw the net over him," CNN quoted a US official as saying.

According to the broadcaster, among the devices that will be in place are U-2 spy planes flying at 70,000 feet.

Predator drones, flying closer at 25,000 feet, are equipped with cameras that can spot vehicles and people and special radar that can operate through clouds. Some of the Predators may also carry Hellfire missiles.

Ground sensors may also be placed along the mountain passes to listen for vehicles.

Data from the planes and sensors will be sent via satellite to analysts for quick action.