Human Rights Watch said Tuesday that Turkey needs to control its security forces and investigate the deaths of civilians who were killed during police operations and clashes with armed groups in recent months.
The group said it documented 15 such deaths in a limited investigation and that local groups report more than 100 deaths since July.
Turkish forces launched a new offensive in July against the outlawed Kurdistan Workers Party (PKK) in southeastern Turkey, a move that ended a cease-fire of more than two years. President Recep Tayyip Erdogan further pledged in November to continue until every one of the militants was defeated.
Human Rights Watch said the state had put neighborhoods under curfew and cut off people's access to water, electricity and food.
Turkey, the United States and European Union all consider the PKK to be a terror group. The conflict between Turkey and the PKK has left 40,000 people dead since 1984.