President of the European Commission Jean-Claude Juncker has urged the sides of the Nagorno-Karabakh conflict to adhere to the ceasefire.

First of all, it is necessary to cease the fire, Juncker said while addressing the meeting of the Parliamentary Assembly of the Council of Europe (PACE) in Strasbourg April19.

"We need to stop firing and respect the ceasefire," he stressed.

On the night of April 2, 2016, all the frontier positions of Azerbaijan were subjected to heavy fire from the Armenian side, which used large-caliber weapons, mortars and grenade launchers.

The armed clashes resulted in deaths and injuries among the Azerbaijani population. Azerbaijan responded with a counter-attack, which led to liberation of several strategic heights and settlements.

Military operations were stopped on the line of contact between Azerbaijani and Armenian armies on Apr. 5 at 12:00 (UTC/GMT + 4 hours) with the consent of the sides, Azerbaijan's Defense Ministry earlier said. Ignoring the agreement, the Armenian side again started violating the ceasefire.