Azerbaijan's military says it has entered the Agdam district of the Nagorno-Karabakh region .
Armenia and Azerbaijan had fought a bloody, six-week flare-up over the mountainous Nagorno-Karabakh region, largely controlled for decades by Christian Armenian troops but considered by the United Nations as part of predominantly Muslim Azerbaijan.
A peace deal reached last week between the warring sides and regional power Russia provided for Armenia to cede control over significant territory in the region, including the Agdam district.
That district had been largely populated by ethnic Azerbaijanis before it was seized by Armenian troops during a war between those former Soviet republics in the early 1990s.
In accordance with the trilateral agreement, "units of the Azerbaijan army entered the Agdam region on November 20", Azerbaijan's defence ministry said on Friday.
With at least 1,000 people reported killed, the fighting that began in late September was the deadliest between Azerbaijan and Armenia since the 1980s-90s war.
