The King's reaction to the ultimatum was exploited by republicans. On February 1, 1908, King Carlos and Prince Luís Filipe were assassinated in Lisbon by two Portuguese republican activist revolutionaries, Alfredo Luís da Costa and Manuel Buíça. Luís Filipe's brother, Manuel, became King Manuel II of Portugal. Two years later, on October 5, 1910, he was overthrown and fled into exile in England in Fulwell Park, Twickenham near London and Portugal became a republic.