MEXICO CITY -- Authorities in the southern Mexican state of Oaxaca are investigating the killing of a journalist.

According to a statement released Thursday by the state, Filadelfo Sanchez Sarmiento walked out of the La Favorita 103.3 FM radio station in Miahuatlan de Porfirio Diaz Thursday morning and was shot dead by two attackers.

The U.S.-based Committee to Protect Journalists condemned the killing. It said that Sanchez Sarmiento hosted a news program and had written for local newspapers. He had received threatening phone calls.

According to CPJ, more than 50 Mexican journalists have been killed or disappeared since 2007.