Taliban claimed on Monday that a married Uzbek couple carried out the suicide attack on a police station at the weekend and threatened further husband-and-wife bombings.
It was the first claim of its kind and only the second time that Pakistani police confirmed a woman blew herself.
Ten policemen were killed Saturday when Taliban militants in burkas attacked a police station in northwest Pakistan, near South Waziristan.
“We sent a husband and wife,” Taliban spokesman Ehsanullah Ehsan told AFP, identifying them as “Uzbek nationals”.
“We have several such couples and we will keep on targeting security forces in Afghanistan and Pakistan until the doors of oppression are shut.”
Pakistani officials had said six attackers were killed after a squad of fighters armed with guns and hand grenades, and disguised in burkas, attacked Kolachi police station and took a group of policemen hostage.
“According to information from our intelligence sources, the bombers were husband and wife but we don’t have any substantial information to prove that at the moment,” police official Imtiaz Shah told AFP.
“The heads of the two bombers we have found show that they were not Pakistani,” he added.