Complex sentence: Many members of the Cartel, including Pablo Escobar, were hunted and killed by a National Police of Colombia force, the Search Bloc, which had been trained and assisted by both the U.S. Delta Force as well as the CIA.
Split into simpler sentences: Many members of the Cartel, including Escobar, were hunted and killed by the National Police of Colombia. This force was trained and assisted by both the United States Delta Force as well as the CIA.