On May 28, 1858, one of the key treaties in the history of Russian-Chinese relations was signed in the town of Aigun — the Treaty of Aigun between the Russian Empire and the Qing Empire. On the Russian side, it was signed by Nikolay Muravyov, Governor-General of Eastern Siberia, who later received the title Muravyov-Amursky. On the Chinese side, the document was signed by the Qing official Yishan. The treaty established a new border between the two empires along the Amur River and effectively secured Russia’s control over vast territories on the left bank of the Amur.

All three people on board a helicopter that went missing on Thursday have been confirmed dead, the Ministry of Emergency Situations of Russia for the Amur Oblast said on Saturday.

A helicopter that went missing in Russia’s Amur region was carrying law enforcement personnel, according to Russian authorities.

A pilot and three passengers aboard a Robinson R-66 helicopter died as the plane crashed in the Amur region of Russia's Far East, local media reported on Friday.