Two persons are reported to be in critical condition at the Bolga Government Hospital with several others injured after armed robbers attacked four buses and robbed occupants of possessions and cash on the Tamale – Bolgatanga highway Saturday.Two of the attacks involving three Yutong buses and a DAF bus, occurred at the same spot near Pong Tamale, with the criminals escaping before a combined team of police and military personnel arrived at the scene.Joy FM’s Northern Regional correspondent, Mahama Shaibu, said the injuries occurred when the robbers shot indiscriminately into their buses after mounting road blocks between 2am and 3am.He said the attacks were conducted separately between Pong-Tamale and Savelugu-Nabongo.At Pong-Tamale, a roadblock by the armed robbers forced a Kumasi-Bolgatanga bound Yutong bus to veer off the road and into surrounding bushes before the robbers shot into it. No one was injured. However a DAF bus with registration number GR 1982 B was also attacked at the same spot and passengers robbed.In the attacks between Savelugu and Nabongo, the armed criminals attacked two Yutong buses and during which they shot into the bus and injured passengers and drivers, leaving two persons in critical condition.Police at Walewale confirmed the two critically injured had been sent to the Bolgantaga Hospital while the rest of the passengers had been to the Walewale police station while the first bus attacked in the Pong-Tamale incidents had been sent to the Tamale Police Station.Myjoyonline.com/Ghana