BANNU: Two persons were gunned down and a passer-by sustained injuries in the jurisdiction of the Cantt Police Station here on Thursday, official sources said.Rahimullah, the relative of the deceased, told the police that Bilal and Sher Daud were on their way home when Abdul Haq, Inayatulllah and Amjad opened fire on them in Tanba area. As a result, Bilal and Sher Daud were killed on the spot while a passer-by identified as Sakhi Zaman sustained injuries. The accused managed to escape after committing the crime.The motive behind the killings stated to be an old enmity, sources said.