At least 10 people were killed and another nine wounded Monday in an explosion at the home of a tribal leader in a restive area of northwest Pakistan, officials said.
The blast came in a remote village in Khyber tribal district, close to the Afghan border in Tirah Valley.
"The initial information suggests that the blast triggered by explosives killed at least 10 people including three children and wounded nine others," a senior local administration official, Nasir Khan, told AFP.
He said the explosion occurred in the reception area of the home of a local tribal elder.
"We are trying to ascertain the exact nature of the blast," Khan said.
Another local administration official confirmed the incident and casualties.
Last year saw a concerted military push in Tirah Valley, which is hemmed in by steep mountains and riddled with caves, and has been a stronghold for militants in Khyber.
The armed forces targeted Taliban and Lashkar-e-Islam militia fighters who were beginning to threaten the nearby city of Peshawar.
Khyber straddles the NATO supply line into Afghanistan, used by US-led troops to evacuate military equipment as they withdraw by the end of this year.
Thousands fled the fighting in Khyber district in the early months of last year, according to aid groups, though by June the army said it had taken control of all the key strategic heights.