Three people were arrested after a traffic stop turned into authorities discovering a meth lab, according to the Drug Enforcement Administration (DEA).

The DEA Atlanta’s office said the traffic stop happened Monday, which led law enforcement to a “large methamphetamine conversion lab at a house in a residential neighborhood in Cobb County.”

The location of the meth lab has not yet been disclosed. The traffic stop leading to this discovery was conducted by Georgia State Patrol troopers, and the DEA said the three individuals arrested are believed to be in the U.S. illegally.