NAIROBI, Kenya — At least 80 civilians have been killed in a new massacre in a western region of Ethiopia, the same place where more than 200 died last month, human rights activists said on Wednesday.

The attack occurred early Tuesday in the Benishangul-Gumuz region, said Aaron Maasho, a senior adviser at the state-run Ethiopian Human Rights Commission.

Other witnesses put the death toll higher, telling Ethiopian state broadcaster EBC more than 100 people died, some of them children.