Former WBC lightweight champion Edwin Valero has been detained on suspicion of killing his wife, police said.
Venezuelan Federal Police Chief Wilmer Flores said Valero was arrested after police found the body of his 20-year-old wife in a hotel in the city of Valencia. Valero left the hotel room around dawn on Sunday and allegedly told the hotel's security personnel that he had killed Jennifer Viera, Mr Flores said.
Mr Flores told state television that police found three stab wounds on Ms Viera's body. He said Valero, 28, was transferred to a local police station, "where we are headed to take samples needed for the investigation of the case" and to question the boxer.
Valero, with a record of 27-0 as a boxer, was replaced as WBC lightweight champion in February after he expressed a desire to challenge for the championship in a higher weight division, said World Boxing Council President Jose Sulaiman.
"He's a boy who is extraordinarily talented in boxing," Mr Sulaiman said. "It's a shame what is happening."