Complex sentence: In Ciudad Juárez, the PGR seized warehouses they believed the cartel to store weapons and cocaine; they also seized over 60 properties all over Mexico belonging to Carrillo, and began an investigation into his dealings with police and government officials.
Split into simpler sentences: In Ciudad Juárez, the PGR seized warehouses they believed the cartel used for storage of weapons and cocaine. PGR agents seized over 60 properties all over Mexico belonging to Carrillo, and began an investigation into his dealings with police and government officials.