A hardline Kurdish militant group claimed responsibility for a bomb attack that wounded 15 people at an Istanbul supermarket, a Kurdish news agency reported. It was the second bomb attack in Istanbul by the same group within five days. The Kurdistan Freedom Falcons Organization, a hardline group believed to be linked to the main Kurdish guerrilla group, Kurdistan Workers Party, or PKK, claimed responsibility for Monday night's bombing in an e-mail, the Netherlands-based Firat News Agency said on its Web site. The same group had also claimed Thursday's bomb attack on an Internet cafe in the city, which killed one person and injured 15 others, including seven policemen. The militant group said in its e-mail that it carried out the attack in response to Turkey's policies toward the Kurdish people, the Firat News Agency said.