Azerbaijan on Tuesday launched a military operation against the breakaway Nagorno-Karabakh region and demanded the total withdrawal of Armenian forces from the disputed mountainous territory as a precondition for peace.Armenia’s foreign ministry condemned Azerbaijani “aggression” against Karabakh.The fighting came just hours after Azerbaijan said four police officers and two civilians were killed in mine blasts in Nagorno-Karabakh, with authorities blaming separatists.