Border Patrol agents stationed in South Texas arrested 18 convicted sex offenders, who were illegally in the U.S., and nine members of notorious street gangs throughout the month of June.

An additional three sex offenders have been arrested so far in July, according to a Border Patrol press release.

The release stated a majority of the sex offenders have convictions for sexual assault crimes involving children.

The offenses occurred in states all over the country, including California and North Carolina, as well as in the Rio Grande Valley.

Additionally, agents arrested eight members of the Mara Salvatrucha gang, or MS-13. Agents also apprehended one member of the 18th Street gang, the release stated.