Mexican authorities are holding 13 police officers for investigation in the disappearance of kidnapped journalist Moises Sanchez.

That represents about a third of the police force of Medellin de Bravo in the Gulf Coast state of Veracruz. All 38 of the municipality's officers were brought in to give statements earlier this week.

Meanwhile, investigators are carrying out DNA tests on two bodies found in the area to determine whether one may be Sanchez.

The journalist was taken from his home last Friday by a group of armed men.

Prosecutor Luis Angel Bravo said late Wednesday that the officers can be held for up to 30 days while the investigation is carried out.