Taliban militants in Pakistan are claiming responsibility for a suicide attack that killed 13 people outside an army base in Pakistan's volatile northwest.

Militant spokesman Maulvi Omar said Monday that the Tehrik-e-Taliban group carried out Sunday's bombing in the city of Mardan. He said the group was seeking revenge for military operations carried out by Pakistani and foreign coalition forces.

Omar specifically condemned a missile strike that killed 14 people in northwestern Pakistan's Bajaur region last week. Pakistan's army says coalition forces in neighboring Afghanistan carried out the attack.

The militant spokesman said Sunday's suicide bombing also was in response to a recent Pakistani military operation in the tribal region of Darra Adam Khel in North West Frontier Province.

He said the Pakistani government should stop such activities while it is negotiating with the militants.

Four soldiers were among the 13 people killed in Sunday's suicide bombing. It was the deadliest attack in more than two months.


Some information for this report was provided by AFP, AP and Reuters.