Andrew Leak threw up to three incendiary devices at the site in Dover, Kent, last Sunday.
The firebombing of an immigration processing centre was motivated by extreme right-wing terrorist ideology, police have said.
Andrew Leak, 66, from High Wycombe, Buckinghamshire, threw up to three incendiary devices at the site in Dover, Kent, last Sunday.
He is believed to have later taken his own life.
Counter Terrorism Policing South East (CTPSE) said evidence showed it “was motivated by a terrorist ideology”.
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