Authorities in Mexico announced Monday a mass grave containing seven bodies was located near the northern Mexican town of Guachochi, in Chihuahua.

The state prosecutor said the grave was located late Friday. The victims include six men and one woman.

All seven victims' hands were bound behind their backs. Authorities say six of the deceased had been strangled, and the other had been shot in the head.

Officials say the victims had all been reported as missing earlier this month. An investigation into the deaths is under way.