Connecticut Attorney General William Tong announced late Monday that his office is in the process of joining with other states investigating Hyundai USA and Kia Motors America for potential unfair and deceptive practices related to spontaneous vehicle fires.

“My office is one of the leaders of an ongoing multistate investigation into deeply troubling reports of spontaneous fires in Hyundai and Kia vehicles,” Tong said in a statement. “We are aware of multiple fires involving Connecticut vehicles, including some allegedly already repaired through the recall process. This is a serious matter, and we are moving aggressively and responsibly to uncover the facts and to ensure accountability.”