An underground marijuana growing operation was dismantled in Arlington Tuesday after authorities found about 100 plants.

Texas Department of Public Safety special agents discovered the operation in the backyard of a home in the 5800 block of Magnum Drive when they went inside to serve a search warrant related to a theft investigation.

DPS officials said an officer found an underground room about 20 feet from the house covered by a outdoor patio. Officers then found a hole that led to a roughly 100-square foot growing area that contained nearly 100 plants.

"It's not a huge marijuana grow, but it is unique in the way it's been conducted," DPS spokesman Lonny Haschel said.

Arlington firefighters and a hazmat team responded to the scene to ensure the underground location was structurally secure while agents collected evidence.

Authorities said they arrested 31-year-old Tri Vo and 26-year-old Jlicia Perry, who face cargo theft charges. Haschel said additional charges may be forthcoming.

NBC 5's Todd L. Davis contributed to this report.