At least 31 people were killed Monday in a remote area of Pakistan close to the border with Afghanistan in what appeared to be a missile strike from an American drone, according to a government official and a resident in the Kurram tribal region. The attack was one of many reported from remote border areas of Pakistan since last August as U.S. forces seek to strike suspected militants who cross into Afghanistan to attack NATO soldiers there. But the attack was the first in the semi-autonomous Kurram tribal region, news reports said. A government official, who declined to be identified by name because he was not authorized to talk to reporters, said the dead in the air strike, near the border town of Parachinar, were all though to be Taliban militants, some of them from outside the Kurram area. The official, and a resident who also sought anonymity, said pilotless U.S. drones had been seen in the area before the strike at around 8.30 a.m. local time in a village called Sur Pul, which was struck by four missiles. The target was a base camp used by Taliban militants, the government official said. He added that the toll might rise as more bodies were pulled from the rubble. The Pakistani authorities have complained that U.S. air strikes undermine the support of Pakistani civilians for the campaign to attack militants in the remote border areas. The authorities made their complaints known to President Obama's special envoy to the region, Richard C. Holbrooke, who visited Pakistan last week before flying on to Afghanistan. But the strike on Monday, coupled with an attack Saturday in South Waziristan that killed more than 30 people, suggested that the new U.S. administration had not abandoned tactics embraced by its predecessor.