Ethnic Armenians from Nagorno-Karabakh ride a truck on their way to Kornidzor in Syunik region, Armenia, Sept. 26, 2023. AP
"Together with our partners we are working hard to send observers as soon as possible," said German Foreign Minister Annalena Baerbock in a statement.
"It would be proof of confidence that Azerbaijan is serious about its commitments on the security and the wellbeing of people in Nagorno-Karabakh if it lets in international observers," she added.
Armenian refugees have been fleeing Nagorno-Karabakh after Baku claimed control of the separatist statelet in a lightning offensive last week.
Baerbock stressed that the population "must be able to stay in their homes and their homeland without fear, in peace and dignity".
But "thousands fear so much for their lives that they see no other way out other than to make their way into Armenia."
Underscoring serious shortages in daily necessities after months of blockades of the area, Baerbock said Germany would raise humanitarian aid it was providing via the International Red Cross to 5 million euros from 2 million.
Predominantly Christian Armenia and overwhelmingly Muslim Azerbaijan have fought two deadly wars over the territory since the Soviet Union's 1991 collapse.
The area is now populated by up to 120,000 ethnic Armenians but is internationally recognised as part of Azerbaijan.