ISLAMABAD — A missile launched from a U.S. drone struck a suspected militant hideout in a tribal region in northern Pakistan where allies of a powerful warlord were gathered Saturday, killing five of his supporters, Pakistani officials said.

The strike in North Waziristan against allies of Hafiz Gul Bahadur, a militant commander whose forces frequently target U.S. and other NATO troops in neighboring Afghanistan, comes amid speculation over whether Pakistan will launch an operation against militants in the tribal region.

The U.S. has pushed Pakistan repeatedly to take such a step and earlier this week U.S. Secretary of Defense Leon Panetta told The Associated Press that Pakistan was preparing an operation targeting the Pakistani Taliban in North Waziristan.