Mexican Federal Police on Wednesday arrested a reputed drug-cartel capo suspected in the murder of the son of prominent poet and journalist Javier Sicilia.

Julio de Jesus Radilla was arrested in the Gulf coast state of Veracruz along with two other suspects thought to have participated with him in the abduction and subsequent killing of Juan Francisco Sicilia and six other men.

The bodies of the seven victims were found March 27 in Temixco, a town in the central state of Morelos.

Radilla is the suspected leader of the Pacifico Sur drug cartel in Morelos, while the other two suspects, identified as Jose Luis Luquin Delgado and Valentin Ortiz Lopez, served under him in a drug-distribution and security capacity, respectively.

Authorities arrested the suspects at two homes in Coatzacoalcos, Veracruz, and also confiscated several firearms in their possession, the statement said.

Before he was taken into custody, Radilla - who bore a wound above one of his eyes when presented to the media - reportedly fired gunshots at the police.

Radilla's capture follows demands by Javier Sicilia that authorities solve the murder of his son and arrest all those responsible.

The writer also has responded to his son's killing by launching a large-scale grassroots movement to demand an end to impunity and the wave of drug-related violence in Mexico. Earlier this month, Sicilia led a big march from Cuernavaca, Morelos' capital, to Mexico City.

Another anti-violence march organized by Sicilia is scheduled to leave Cuernavaca on June 4 and pass through some of the towns most affected by drug-related violence before arriving in the crime-wracked northern border city of Ciudad Juarez.

Sicilia has become a spokesman for the relatives of thousands of innocent victims of turf battles among drug cartels and the mobs' clashes with security forces in different parts of the country.

Nearly 40,000 people have been killed in drug-related violence since President Felipe Calderon took office in December 2006 and militarized the struggle against the cartels.