The region of Nagorno-Karabakh and areas around it are considered to be some of the most heavily mined regions of the former Soviet Union. Mines were laid from early 1990s by both Azerbaijani and Armenian forces during and after the First Nagorno-Karabakh War. The worst-affected areas are along the fortified former contact line between Azerbaijani and Armenian forces, in particular in the districts of Aghdam, Fuzuli and Jabrayil. According to military experts from both Azerbaijan and Armenia, the ground in those areas is covered with "carpets of land mines."