Two explosions and shooting were heard on Monday outside the office of a senior government official in the northwestern Pakistani city of Peshawar, a Reuters witness said.
Officials said they feared casualties in the attack on the compound of top political official Muttahirzeb Khan.
Officials suspect two suicide bombers entered the compound, where a meeting of tribal and government officials was being held.
After shooting was heard, two large explosions rattled the compound.
Militants have stepped up attacks across Pakistan just months ahead of a national election. On Saturday, 85 people, were killed in the southwestern city of Quetta in an attack blamed on militants.
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