Jakarta – Indonesian police said yesterday they suspected a concerted bombing campaign was under way after a woman was injured in the second blast here in less than a week. Two cars were also damaged in the blast under a flyover in South Jakarta.

This was the latest incident to create security fears ahead of impeachment hearings against President Abdurrahman Wahid. The Sunday blast was the second to rock the capital since Wednesday, when an object hurled from a truck passing a flyover in west Jakarta killed one person and injured 10 others.

"This is getting to be a habit," South Jakarta deputy police chief F.F.J. Mirah was quoted as saying by The Jakarta Post as he surveyed Sunday's blast scene. "All this is happening just days before the special session. I can't stand this," he said.

Parliamentary leaders are threatening to bring forward their hearings against Mr Abdurrahman from the scheduled date of August 1, if the President implements his threat to declare a state of emergency on Friday.

Jakarta police chief Inspector-General Sofyan Jacoeb said the characteristics of the two explosions were "almost the same". "We suspect the intended target of the explosions was not a certain person but public places," he was quoted as saying by the Satunet online news service. "The attackers in both cases ... used a red Kijang car and struck at busy hours," he said, adding that both intersections were "strategic locations".

The explosions are the latest in a series to rock Jakarta and other Indonesian cities since last year. A blast believed to have been caused by a home-made bomb razed a boarding house here on June 19, injuring five people.

A south Jakarta dormitory for students from the restive province of Aceh blew up in May, killing three people. Police later said the blast was caused by a bomb that was probably being manufactured there.