During a special operation to neutralize members of illegal armed groups in Makhachkala, three militants, including one woman, were killed, Itar-Tass reported. Gunmen were blocked in a flat on the fourth floor of multi-storey building No 90A in Akushinsky Avenue on Friday, the law enforcement bodies of the republic said. According to the law enforcement bodies, all the gunmen were killed in a skirmish. At present, an investigation team and sappers are working at the site of the incident. Criminal proceedings were instituted.