Human rights activists have presented a criminal complaint in Chile for the alleged disappearance of some 100 political prisoners that were reportedly kept at an enclave of German immigrants called Colonia Dignidad during the country's 1973-1990 military dictatorship.

Relatives of the alleged victims took advantage of the visit to Chile of German President Joachim Gauck to call on the two countries to work together in clearing up what happened inside the enclave that was founded in 1960 about 250 miles (400 kilometers) southeast of Chile's capital, Santiago.

The complaint alleges that the Chilean army ran "extermination commandos" inside the enclave with the collaboration of the German immigrant leadership overseeing the community.