MEXICO CITY — The body of a photographer was found Friday in the northern state of San Luis Potosí, a day after he was abducted from his home by men dressed as police officers, Mexican officials said.

The photographer, Edgar Daniel Esqueda Castro, is the fifth journalist to be killed in Mexico this year in retaliation for their reporting, according to the Committee to Protect Journalists in New York.

Another journalist, Salvador Adame Pardo, was abducted from his home in the Mexican state of Michoacán in May; although the authorities say that his burned body was found, his family believes that he is still missing.

According to Mr. Esqueda’s wife, armed men broke into the couple’s house while they were sleeping and said they were government agents. “They grabbed Edgar by the neck and threw him to the ground while pointing a gun at me,” she told Reporters Without Borders, a press freedom group.