A bomb exploded Saturday at an American fast food restaurant in the Indonesian capital, police and witnesses said, just a week before a planned visit to the country by US President George W. Bush. The blast wounded one person believed to be carrying the device. The lunchtime blast cracked a window and shattered lamps at the A&W burger restaurant in an eastern Jakarta shopping mall rarely visited by foreigners, said an Associated Press reporter at the scene. A restaurant employee said staff had seen a man outside the eatery who looked seriously ill, and brought him inside to offer him food or medicine. A small bomb then fell from his bag and went off, said A&W cashier Sofyan.