Azerbaijan’s military planes are flying over the contact line of Azerbaijani and Armenian troops, press service of Azerbaijani Defense Ministry told Trend on Friday.

The flights are being conducted due to an escalated situation on the contact line between Azerbaijani and Armenian troops.

The situation on the contact line of Azerbaijani and Armenian troops has been escalating for the past four days. Armenian armed forces have violated the ceasefire status 380 times, Azerbaijani Defence Ministry reported earlier.

The conflict between the two South Caucasus countries began in 1988 when Armenia made territorial claims against Azerbaijan. Armenian armed forces have occupied 20 per cent of Azerbaijan since 1992, including the Nagorno-Karabakh region and seven surrounding districts.

Azerbaijan and Armenia signed a ceasefire agreement in 1994. The co-chairs of the OSCE Minsk Group, Russia, France and the U.S. are currently holding peace negotiations.

Armenia has not yet implemented the U.N. Security Council’s four resolutions on the liberation of the Nagorno-Karabakh and the surrounding regions.