"I met with Foreign Minister (Armenia. -

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) Zohrab Mnatsakanyan to discuss the need for an immediate ceasefire and return to negotiations with Azerbaijan under the auspices of the Minsk Group (OSCE. -

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)," O'Brien said.

He noted that the US will continue its strongest diplomatic efforts at all levels until the conflict is resolved.

“At a meeting with Azerbaijani Foreign Minister Jeyhun Bayramov, I put pressure to return to negotiations with Armenia under the auspices of the Minsk Group, so that there was a rejection of external forces that would further destabilize the situation,” added Trump's adviser.

Earlier, US President Donald Trump said that good progress has been made in the negotiations on Nagorno-Karabakh.