Members of police K-9 unit with a bomb sniffing dog guard a Kentucky Fried Chicken restaurant, very close the site where an explosion went off at Jakarta Airport

JAKARTA, April 27 (IslamOnline.net & News Agencies) - A bomb ripped through a restaurant area at Indonesia's main international airport early Sunday, April 27, 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, Agence France-Presse (AFP) said.

"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, April 27). National police chief Dai Bachtiar said six people were hurt but hospital officials said 11 were injured, including a woman who lost a leg.

"This is (intended) to create fear but we are still investigating which group is responsible," Bachtiar said.

He said security would be tightened nationwide in public places "because if we leave such public places without security such an incident will happen again."

Yudhoyono said there may be "some correlation with the ongoing trial of a number of figures suspected of involvement in terrorism."

Abu Bakar Bashir, the alleged leader of the Jemaah Islamiyah (JI) group, went on trial Wednesday, April 23, for treason in connection with a series of deadly blasts. On the same day police announced the arrest of 18 JI suspects and said they had seized weapons and explosives.

The blast carpeted the restaurant area with broken glass. A restaurant serving Korean food appeared to suffer the worst damage.

"When the bomb blew up, there was a clear flame," said Supriyadi, a hawker selling perfume in the area. He was unhurt.

Transport Minister Agum Gumelar said security at all airports would be tightened.

National detective chief Erwin Mappaseng said there were some similarities with a bomb that exploded near the United Nations mission in central Jakarta early Thursday, April 24, causing no injuries and little damage.

"The aims of the perpetrators are clearly to terrorize people, to scare them," Mappaseng said.

Jihan, 32, who was among the injured, said he believed the blast came from a bag placed under a seat.

Jemaah Islamiyah is accused of staging the October 12 Bali bombings which killed 202 people and dozens of other blasts.

Leading Bali suspects are due to stand trial next month.

Bachtiar warned Friday that “terrorists” would not give up despite the arrest of suspected JI members.

"Their documents show that they are not quitting. They will continue to engage in terrorist activity," he said.

Last December 5 bombers killed three people and injured 11 in an attack on a McDonald's restaurant in Makassar city. Police have said people arrested for that blast are believed to be linked to the Bali bombers.

Yudhoyono said Indonesia faces twin threats -- from terrorism and from separatist movements in Aceh, in Papua, and to a lesser extent in the Maluku islands.

He said there were indications of correlations between the situation in Aceh and several recent acts of terrorism.

Police have said a key suspect in a recent bombing at Medan in North Sumatra was an Aceh rebel leader.

Peace talks with Aceh separatist rebel leaders were cancelled this weekend.