"The team is currently following a track to a location where he might have fled to," the head of the National Police`s public information bureau, Brigadier General Ketut Untung Yoga, said here on Thursday.
He said the police were looking for the school principal to coordinate with him on the chronology of the incident after they were unable to find him at the location of the incident.
Untung would not disclose the name of the school principal nor the location where he might have fled to.
He said the house of the school principal caught fire at around 5 am on Thursday but villagers were able to extinguish it at 10 am.
The police had so far discovered nine Molotov cocktails, several knives, tens of catapults, arrows, books on jihad, video compact disc on the declaration of the Jamaah Ansharut Tauhid (JAT) in Bekasi, West Java, at the location.
The police also found a crater left by the explosion and bomb making tools and materials, such as sulfur, a welding tool and pipes.
Police investigators are now still questioning seven people believed to know about the incident.
A bomb exploded at the school at around 3.30pm on Monday killing Firdaus who was a teacher at the school.
Some local community members and school students blocked access to the school when police were trying to enter the premises. Only after some persuasive approaches to local community leaders could the police enter the location on Wednesday.
The JAT was founded by Abu Bakar Ba`asyir who was recently convicted of involvement in terrorism and sentenced to 15 years in jail.