Colombian authorities arrested 20 people in 4 different cities in Colombia who formed part of a network that helped send upwards of 700 kilos of cocaine per month to the United States and Europe, reported El Colombiano.

The group allegedly worked for the Oficina de Envigado and the Rastrojos and had as its headquarter Cartagena, Colombia. It’s not clear if it operated as a separate entity or was integrated in one of the two syndicates, but authorities said the leaders were in contact with Maximiliano Bonilla, alias “Valenciano”, the head of the Oficina<, and Luis Enrique Calle Serna, alias “Comba,” the head of the Rastrojos.