Mines were laid in the region from 1991 to 1994 by both conflicting parties in the first Nagorno-Karabakh War. The United Nations Development Program (UNDP) claims that 123 people have been killed and over 300 injured by landmines near the disputed enclave of Nagorno-Karabakh since a 1994 truce ended a six-year conflict between ethnic Armenian and Azerbaijani forces.