From the end of November to the beginning of December last year, Amnesty's investigators visited 18 sites in Azerbaijan and Armenia, also in the Nagorno-Karabakh region, where several attacks have taken place.
Among other things, Amnesty says that several areas where civilians were found were shelled blindly with cluster munitions and rockets.
Something that has led to many non-combatants dying.
"By using these imprecise and deadly weapons in civilian areas, Armenian and Azerbaijani forces have violated the laws of war and violated respect for human life," said Marie Struthers, Amnesty International's chief of staff in Eastern Europe and Central Asia.
According to the report, at least 146 civilians were killed in the conflict and several hundred were injured.
A figure one also believes would be far higher if people did not flee their homes when the conflict began.
In addition, a number of buildings that are not legitimate military targets have been damaged and destroyed.
The report is based, among other things, on interviews with 79 survivors, witnesses and relatives of civilians killed and injured in the attacks, as well as representatives of local civilian and military authorities and journalists.
Amnesty has also examined fragments from ammunition, satellite images and films and photos taken during the conflict.