Peshawar- One person was killed and another injured on Saturday when unidentified gunmen opened fire on a passenger coach in Khyber Pakhtunkhwa province's Hangu district. Police sources said unidentified assailants opened fire on the coach near Doaba area of Hangu leading to the casualties. Police has registered a case and is investigating the motive and other circumstances surrounding the attack. Meanwhile, in the Bajaur tribal region, suspected militants blew up an under construction Frontier Corps (FC) picket in the agency’s Gaki Pass area. Official sources said the check post was under construction and no loss of life took place in the attack.