The death toll from a suicide attack on a security post in north-west Pakistan rose to 14 police officers, authorities said on Sunday morning. A self-proclaimed breakaway group of the Pakistan Taliban has claimed responsibility for the attack. A suicide bomber and several gunmen detonated an explosives-laden vehicle near the post in Bannu, a district in Khyber Pakhtunkhwa province bordering Afghanistan , late on Saturday, said senior police official Sajjad Khan. The attack triggered an intense shootout, with some officers being killed in the exchange, while others died later after the building collapsed. Rescuers conducted a search operation for hours using heavy machinery to retrieve bodies from under the rubble, Khan said, adding that three police officers were wounded in the attack. Security forces have also launched an operation to track down the perpetrators.…