Mexico's National Human Rights Commission says it is investigating the killing of a journalist in Veracruz, an eastern state that has been the site of many journalists' slayings in recent years.

Reporters Without Borders on Monday condemned the killing of Manuel Torres. The group says Torres worked as a freelance reporter and also for the city government in Poza Rica.

Torres was killed Saturday by a single shot to the head as he returned home. Until 2014, he was a local reporter for TV Azteca. He also maintained a news website. More recently he also worked for a city councilman.

The state prosecutor's office says it will investigate the murder.

At least 16 journalists have been killed in Veracruz since 2010 and three others have disappeared.