http://www.cnn.com/2011/WORLD/asiapc...lan/index.html

Authorities found about 150 kilograms (330 pounds) of explosives near the church on Thursday, said Boy Rafli Amar, the national police spokesman.

There were two large bombs and five smaller ones, he said.
The actual CNN report (on T.V.) also mentioned the bombs were placed next to a gas pipeline and that the potential casualty figures could have been quite high if this attack wasn't disrupted.

The security forces in Indonesia have been highly successful in the past few years, but extremist groups are still operating. One of their goals is to re-create the ethnic strife responsible for hundreds of deaths a decade ago, which appears to be the logic behind this target.

Indonesia is the largest Muslim nation in the world, so what happens there matters.