Two ‘British citizens’ have been tragically found shot dead in a burned-out car in Sweden, prompting police to open a double-murder investigation.

The pair are believed to have been shot before the car was set alight, according to local media. Their corpses were recovered by firefighters at around 2 pm on Sunday afternoon, on a dirt road in Fosieby industriområde, an industrial district of Sweden’s third-largest city, Malmo. Local reports suggest that at least one of the victims was found with suspected bullet injuries.

Reports suggest the victims had rented a car at Copenhagen Kastrup Airport in Denmark before they were found across the border in Sweden. The victims are said to have been captured on surveillance images when they passed through the Öresund Bridge toll station, according to local outlet TV4, but police have not confirmed any details about the case.

Their identities are yet to be confirmed by a forensic examination, but Swedish police officials have confirmed that they “have an idea of who they are.” Swedish prosecutor Adrien Combier-Hogg says the identities will not be released before the forensic examination is complete, however, they confirmed that the victims are not Danish. While authorities have not confirmed that the victims were British, it is believed that it was a British pair who rented the car at Copenhagen Airport.