A suspect has been arrested in connection with the murder of journalist Regina Martinez last April in the Mexican Gulf state of Veracruz, state prosecutors said.

Jorge Antonio Hernandez Silva was arrested on Monday for the killing of Martinez, who worked as a correspondent for the weekly Proceso, Veracruz Attorney General Amadeo Flores Espinosa said.

Hernandez Silva confessed to the killing and said the motive was robbery, the AG said.

Evidence gathered during the investigation and statements from witnesses confirm Hernandez Silva's version of events, Flores said.

A second person involved in the murder, identified as Jose Adrian Hernandez Dominguez, is being sought by police, Flores said.

Assistance has been requested from the federal Attorney General's Office in finding the second suspect, Flores said.

Regina Martinez's body was found on April 28 at her house in Xalapa, the capital of Veracruz, where she was beaten and strangled.

Nine journalists have been murdered in Veracruz since December 2010, when Javier Duarte, of the Institutional Revolutionary Party, or PRI, became governor.

Photojournalists Gabriel Huge, Esteban Rodriguez and Guillermo Luna were killed on May 3 in the port city of Veracruz.

Journalists Noel Lopez Olguin, Yolanda Ordaz de la Cruz, Miguel Angel Lopez Velasco and Misael Lopez Solana were murdered in 2011. EFE