FBI Houston said Austin Tanton and Kayla Thompson were taken into custody in Cleveland, Texas.
Federal officials said the two are charged with conspiracy to commit malicious use of explosive materials and using explosive materials in the commission of a felony, with Tanton also facing a possession of an unregistered destructive device charge.
On Nov. 5, 2023, Tanton allegedly threw a crude incendiary device, known as a Molotov cocktail, through a window of the Huyen Trang Buddhist Meditation Center, igniting the fire.
SEE ORIGINAL REPORT: Buddhist temple firebombed by man seen throwing Molotov cocktail, video shows
Buddhist temple firebombed by man seen throwing Molotov cocktail
Officials said the flames only damaged a rug and flooring inside the building after Monks who had been sleeping in the temple woke up and worked to quickly put out the fire.
In November of that year, the owner spoke to ABC13 and shared the video showing the moment a person was seen throwing a bottle on fire into the facility.
U.S. Department of Justice officials said surveillance video also captured a vehicle stopping near the property gate late at night before the alleged attack. Investigators said they later identified Tanton as the suspect and Thompson as the driver of that vehicle.
The two could face up to 20 years in federal prison, authorities added.
They both appear before a judge on Friday afternoon wearing tee-shirts, gym shorts, and chains. No details of the case were discussed. Both will be held in custody until their detention and arrangement hearings at 10 a.m. on Wednesday.
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Editor's note: The U.S. Attorney's Office sent a correction on the date from Nov. 15 to Nov. 5 for the time of the incident.