Independent experts sent to Mexico by the Inter-American Commission on Human Rights say they won't work with Mexican prosecutors investigating the alleged burning of 43 missing college students at a garbage dump.

The experts criticized prosecutors' decision to release a report last week saying there was a fire at the dump and the remains of at least 17 people were found there.

The experts said Wednesday the report was inconclusive. They have cast doubt on whether such a large fire was possible there.

The experts will wind up their work in April.

Forty-three students at a radical teachers college disappeared in Guerrero state on Sept. 26, 2014. Mexican prosecutors say local police turned the students over to a drug gang that killed them and incinerated the bodies at the dump.