Police have arrested the fugitive mayor of the Mexican town of Iguala, where 43 students went missing in September, media reports say.
According to the reports, Jose Luis Abarca was arrested by federal police officers in the capital, Mexico City.
Mexican officials have accused Abarca of ordering police to confront the students on the day of their disappearance on 26 September.
Eyewitnesses described seeing them being bundled into police cars.
Mexican officials had issued an arrest warrant for Abarca and his wife, Maria de los Angeles Pineda, after Iguala police officers said they had received an order from the mayor to intercept the students.
The officers said they had been told to stop the students from interrupting a speech given by Ms Pineda in Iguala on that day.
The students, from a nearby teacher training college, had travelled to Iguala to raise funds and protest. They have not been seen since.
A search has uncovered a series of mass graves in the area, but initial tests suggested they were not those of the students.