"We also remember Somgait," US Co-Chair of the OSCE Minsk Group James Warlick said on Twitter.
"Both Armenia and Azerbaijan should support people-to-people programs to develop tolerance and trust," he continued.
As many as 26 years have passed since the Armenian massacres in the Azeri city of Sumqayit. Dozens of Armenians were killed, hundreds wounded, thousands deported as a result.