Flammable devices have been thrown at a Border Force migrant centre in Dover.
Kent Police were called at 11.22am on Sunday to The Viaduct, where two to three incendiary devices had caused a fire.
One minor injury was reported and the suspect has been identified and located.
A man is said to have thrown petrol bombs with fireworks attached before killing himself, a Reuters photographer said.
The attacker was described as a white man wearing a striped top, who drove up to the centre in a white Seat sports utility vehicle, the agency reported.
Police were unable to confirm reports that the suspect had died and said inquiries are ongoing.
The incident came after almost 1,000 migrants arrived in the UK after crossing the Channel on Saturday.
A British Home Office spokesman said: “We are aware of an incident at Western Jet Foil, Dover, and police are in attendance.
“It would not be appropriate to comment further at this stage.”
Kent Fire and Rescue Service confirmed its crews had put out fires.
Nathalie Elphicke, the Conservative MP for Dover, said she was “deeply shocked”.
