US fighter jets were today seen flying over Pakistan's restive Mohmand tribal region bordering Afghanistan for almost two hours, local residents and officials said.
The jets, which were flying at low altitude, intruded almost 50 km into Pakistani airspace.
They were seen flying over Soran Darra, Ghanam Shah, Shaikh Baba, Matai and Khazeena Chinari, which are located west of Ghalanai, the main town of Mohmand Agency.
Officials of the local political administration also confirmed the intrusion by the US jets.
Local residents said the aircraft flew across the Afghan border at around 8 am and remained in Pakistani airspace for almost two hours.
The tribesmen protested against the intrusion by the US fighters, saying international norms do not allow aircraft of a foreign country to fly over an independent nation without its permission.
Tribal elders asked the government to take up the matter with the UN and vowed to defend Pakistan against "any foreign aggression".