State prosecutors have detained a town's police force following the disappearance of a journalist in the southern state of Veracruz.

In a statement Tuesday, the Veracruz state prosecutor's office said 36 members of the Medellin de Bravo police department were brought in to give statements. Authorities detained three police officers there Monday.

The prosecutor's office said that one of its lines of investigation is looking at the social activism of journalist Moises Sanchez Cerezo, some of which was aimed at Medellin Mayor Omar Cruz.

Sanchez's brother Juan Carlos Sanchez said Monday that his brother had been threatened by Cruz. Cruz denied any involvement at a news conference Monday.

A group of nine armed men took Sanchez from his home on Friday along with his computer, camera and telephones.