Heavily armed police and military personnel were seen at churches during Easter celebrations across the vast Muslim-majority nation, where Christians form 10 per cent of the population.
Indonesia has long struggled with attacks by Islamist militants, and has been on edge since two suicide bombers blew themselves up at a church in Makassar city on Sulawesi island, wounding 20 people.
"The enthusiasm of church-goers today was still high despite the attack in Makassar," Indonesian Communion of Churches spokesman Philip Situmorang told AFP. "The police coordinated... to provide security at churches."
The authorities alleged the Makassar bombers were members of a pro-Islamic State extremist group.
National Police spokesman Rusdi Hartono said on Thursday (April 1) that police across the country had been ordered to anticipate potential terror attacks against churches during Easter celebrations.