A petrol bomb attack on an immigration center in the southern English port town of Dover on October 30 was apparently motivated by an extreme right-wing terrorist ideology, according to British police, who stated this on Saturday.

Police reported that 66-year-old Andrew Leak, who was discovered dead at a nearby gas station shortly after the attack, had likely acted alone. No one was badly harmed in the event.

According to a police statement, “there is currently no evidence to suggest the offender was working alongside anyone else and there is not believed to be any wider threat to the public.”

The Dover immigration facility is the first stop for thousands of people making the dangerous journey across the English Channel to seek asylum in Britain.

Evidence from digital media devices suggested Leak was motivated by extreme right-wing ideology, although there were also strong indications that Leak’s mental health was a factor in the attack, police said, adding that investigations are continuing.

Immigration is a heated political issue in Britain.

Prime Minister Rishi Sunak has said Britain is a compassionate and welcoming place for asylum seekers, but this depends on the country being able to effectively police its borders.

Sunak’s interior minister, Suella Braverman, is facing heavy criticism for describing the arrival of asylum seekers as an invasion.