At least 28 people were killed Thursday in a suicide bombing and a missile attack carried out by a US pilotless aircraft in Pakistan's troubled northwest region, government officials said.

A suicide bomber struck at a Pakistani security post on the border with Afghanistan when members of tribal police, known locally as the Khasadar force, gathered at the Torkham border checkpoint in the north-western tribal district of Khyber for an iftar, a meal to break the daily fast during the Muslim month of Ramadan.