The OSCE Minsk Group co-chairmen started their regional visit from the unrecognised "Nagorno-Karabakh Republic", Armenia Today reported.
They negotiated with leaders of the separatists Bako Sahakyan and Karen Mirzoyan.
Bako Sahakyan received the OSCE Minsk Group co-chairmen Igor Popov (Russia), Jacques Faure (France) and Ian Kelly (USA).
While answering a question over Khojaly airport, Ian Kelly said that they want to promote a peaceful settlement.
French co-chairman Jacques Faure stressed that the process over the airport is underway. It is too early to talk about details. "We are constantly working on this and have specific proposals which we are discussing with the parties," he said.
"After our visit we will publish our traditional statement," Russian co-chairman Igor Popov said.
The co-chairmen will meet with Armenian President Serzh Sargsyan and Foreign Minister Edward Nalbandian in Yerevan on March 20.
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.