Mexico's federal police arrested four suspected members of two criminal gangs battling each other for control of the drug trade in the Pacific resort of Acapulco, authorities said Thursday.

Martin Campos Salado, 24, was apprehended Wednesday in Acapulco, the federal Public Safety Office said in a statement.

Information obtained from Campos led police to a home in the city where his associate Benito Ascencio Cardenas was holding a kidnapping victim, who was freed in the operation.

Authorities say Campos coordinated abductions and commanded a squad of assassins working for the La Barredora drug gang, including three men arrested Monday as they were trying to leave two coolers containing human remains on Acapulco's most popular beach.

Campos ordered the killings of those victims and "participated in the dismemberment of the bodies," according to the official statement.

The 25-year-old Ascencio is accused of torturing captives and of collecting ransom and extortion payments on behalf of La Barredora.

Two men from the rival Independent Cartel of Acapulco, or CIDA, were detained Wednesday in a separate operation, federal officials said.

Joel Ramos Santiago, 28, and Samuel Oliver Bello Castro, 24, are accused of peddling drugs in Acapulco and said to be linked to several abductions.

Police seized two handguns, five kilos of marijuana and 25 retail-size packets of cocaine from the two men.

CIDA and La Barredora emerged from the remnants of a drug trafficking outfit led by Edgar Valdez Villarreal, alias "La Barbie," a Texas-born capo arrested in August 2010.

The turf battle between the two groups is blamed for a surge of violence in Acapulco and the surrounding state of Guerrero.

The number of drug-related homicides in Guerrero doubled in the first nine months of the year, the Mexican government says.