Police in Indonesia have forced their way into an Islamist school for the first time since a bomb blast killed a man at the school on Monday.

National police said three people were wounded in Wednesday's assault, which ended a two-day standoff with students armed with sticks and machetes.

Police were seeking to investigate the detonation on Monday of a homemade bomb which killed a man who has been variously described as a suspected terrorist or a senior official of the school.

The school has been linked to Jemaah Ansharut Tauhid, a hard-line group founded by radical preacher Abu Bakar Bashir. The cleric was sentenced last month to 15 years in prison for helping to organize a terrorist training camp in northwestern Aceh province.

Four platoons of a local mobile police brigade, backed by other security forces, were deployed for the assault against about 45 students.

Last month, a student at the school was arrested for fatally stabbing a police officer in the neck.

Some information for this report was provided by AP, AFP and Reuters.