 On 26 February 1992, Azeri civilians were massacred in the Khojaly Massacre by Armenian forces.By spring 1992 the conflict in Nagorno-Karabakh escalated.Azerbaijan tightened the blockade which it had imposed on Nagorno-Karabakh for about two years, at the same time employing policy of ethnic cleansing and military assaults against the Armenians in Karabakh.