The incident is believed to be related to migrant smuggling from Latvia, and a pre-trial investigation has been launched, Giedrius Mišutis, an advisor to the Lithuanian State Border Guard Service, was quoted as saying.
Police called border guards to the scene, who checked the area with service dogs, but no other persons were found.
According to the police, at 7:44 p.m., a Volvo V40 was spotted in a pond. It is believed that the car had veered off the road and overturned.