A police officer was killed when a truck hit a motorcycle carrying him on Hatikumrul-Bonpara highway of Solonga upazila in Sirajganj on Wednesday morning.The deceased is Nurul Islam, 30, Assistant Sub Inspector of Police, hailed from Kamarkhand upazila in the district. Officer-in-charge of Hatikumrul Highway Police Station Abdul Kader Jilani said, Nurul was killed on the spot when a truck hit his motorcycle.