A bomb ripped through a restaurant area at Indonesia's main international airport, injuring 11 people in what officials called a terrorist attack. The blast near a Kentucky Fried Chicken restaurant -- the second explosion in three days in the country -- may be linked to current or pending trials of terror suspects, said top security minister Susilo Bambang Yudhoyono. "We cannot afford to relax our alertness ... do not only rely on the police, there should be a national movement to continue to prevent these acts of terrorism," he said. Police cordoned off the scene of the blast at the domestic terminal of Sukarno-Hatta airport outside Jakarta. The airport remained open. The pipe bomb, detonated by a motorcycle battery, exploded around 6:30 am (2330 GMT Saturday). National police chief Dai Bachtiar said six people were hurt but hospital officials said 11 were injured, including a woman who lost a leg.