The City police have apprehended one suspected NDFB ultra suspected to be involved in the firing incident in Rupnagar area, Guwahati this afternoon. Police have suspected that the militant was in the Rupnagar area beside the ASTC workshop to collect cash. Acting on tip off the police chased them. They started firing the police vehicle forcing the police to retaliate immediately. After the end of the half and hour firing, the two militants have been apprehending. Investigation is in progress.