A legislative assistant to North Carolina State Senator Norman Sanderson has been arrested and charged with first-degree arson after authorities accused her of intentionally setting a Raleigh home on fire while two people were inside, according to local affiliate Fox8 Raleigh.

The aide, 38-year-old Diane Cook, was taken into custody and booked into the Wake County Detention Center on Monday. Investigators say Cook “willfully” and “maliciously” set the blaze, though officials have not yet confirmed whether she had any connection to the residents of the home.

The fire did not result in reported injuries, but authorities have released few additional details about what led to the alleged arson or how Cook became a suspect. She is expected to make her first court appearance on Tuesday.

The arrest adds fresh turmoil around Senator Sanderson, a Republican and former sheriff’s deputy, who was himself arrested earlier this year. Sanderson was pulled over on October 18 and recorded a blood alcohol concentration of .16 — twice the legal limit, according to Fox8. He was charged with driving while impaired, possessing an open container, and failing to obey a traffic order.

Sanderson later issued a public statement calling his actions “a regrettable mistake” and said he took full responsibility.

Cook’s arrest now places additional pressure on the senator’s office as investigators continue to examine the circumstances of the Raleigh fire. Authorities have not indicated whether further charges are expected.