ATHENS, Greece (AP) _ A homemade bomb exploded early Sunday and caused serious damage at a warehouse used to store goods from the U.S. sportswear firm Nike, police said. No one was hurt.

An arsonist group calling itself Philiki Eteria claimed responsibility for the pre-dawn attack in the Athens suburb of Paleo Faliro. Police said the explosion was caused by a gasoline bomb.

Dozens of small arson and bomb attacks occur each year in the capital. Most are claimed by fringe leftist or anarchist groups, targeting the offices or cars of government agencies and large companies.

The little-known group that claimed Sunday's attack takes its name from the Philiki Eteria, or Friendly Society, an organization founded in 1814 with the aim of liberating Greece from Ottoman occupation through armed revolt.