Members of the Tren de Aragua gang – the same group that has taken over apartment buildings in Colorado – were arrested in San Antonio, Texas, earlier this month.

A weeks-long joint operation at the beginning of the month saw 20 people arrested from an apartment complex in San Antonio, My San Antonio reported. Four of the people arrested were members of Tren de Aragua, known for violent illegal activities, including murder, drugs, and human trafficking.

San Antonio Police Chief Bill McManus said earlier this month that one of those arrested was “an enforcer” in the gang. He also said the bust was just the first, hinting that more arrests were to come. McManus noted that police had received multiple complaints from residents at an apartment complex, alleging drugs were being sold, people were being trafficked, and apartment employees were being threatened.

“We’re on to you, we’re coming for you, and we know where you are,” McManus said at a press conference, according to My San Antonio.

The outlet also reported that two members of the gang were arrested during a traffic stop the previous week, and that the police had shared a map showing suspected and documented gang activity.

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Last month, Gov. Greg Abbott (R-TX) declared Tren de Aragua to be a “foreign terrorist organization” following reports that more than 100 members of the gang had violently forced their way across the U.S. southern border, The Daily Wire reported at the time.

“The recent entry and expansion of the vicious Venezuelan gang, Tren de Aragua, is a dangerous and deadly problem facing our state and nation,” Abbott said.

“Our goal is to defend Texas from the growing threat of the gang. We will not let them use Texas as a base of operations to terrorize our citizens. They have a target on their back, and we are going after them. Texas is the wrong state for them to try to do business in,” the governor added.

The Daily Mail reported that the Tren de Aragua gang has taken over four apartment complexes in San Antonio. The Mail, citing law enforcement sources and residents of the complexes, said the situation has been going on for five or six months. The gangs have reportedly squatted in empty apartments and used them to deal drugs or traffic women and children for sex.

The San Antonio Police Department would not verify the claims made in the Mail article to The Daily Wire but did not deny them either.