Secretary of State Marco Rubio announced the designation during a visit to Quito, accusing Los Tiguerones of aiding cartels and attacking civilians, police and journalists.
https://www.foxnews.com/politics/rubio-designates-ecuadorian-gang-linked-drug-trafficking-terrorist-group
https://www.foxnews.com/politics/rubio-designates-ecuadorian-gang-linked-drug-trafficking-terrorist-group