BANNU: Pakistani police and troops fired warning shots Tuesday to break up a protest over food shortages by people who have fled a military operation against the Taleban.

The offensive has seen the northwestern tribal area of North Waziristan hit by more than a week of shelling and air raids, and more than 450,000 people have fled ahead of an impending ground assault, with many going to the nearby town of Bannu.

The World Food Programme (WFP) began distributing aid through a local aid group on Monday, but there was anger among refugees at long delays.

Anger at problems with food distribution spilled over on Tuesday, with people blocking the main road from Bannu to Khyber-Pakhtunkhwa provincial capital Peshawar.

Meanwhile, three people were killed Tuesday in a suicide bombing in North Waziristan tribal area, the first such attack there since the military operation against the Taleban and other militants.

The blast came as Pakistan’s military said it had killed 47 fighters in the tribal northwest, in the latest airstrikes carried out as part of an offensive that began more than a week ago.

An AFP reporter saw around 500 people blocking the road and pelting security forces with rocks in protest, prompting police and soldiers to fire warning shots in the air to disperse them.

Mohammad Nazir Khan, a lawmaker from the region, said many people who should be receiving aid were having problems with registration and documents.