DHAKA: Some 350,000 people have been displaced since the start of an army offensive against militants in Pakistan’s North Waziristan a week ago.

Officials say, reports the BBC.

Long lines of buses and lorries are reported waiting in intense heat for security clearance to enter the nearest town of Bannu.

There are fears the refugees could spread polio, as many of the displaced children have not been vaccinated.

The offensive began after a deadly attack on Karachi airport.

The attack was claimed by an Uzbek militant group and the Pakistani Taliban.

Tens of thousands of children are among those who are currently on the move in the tribal region.

BDST: 1658 HRS, JUNE 22, 2014