Worshippers at the Ahmadiyah sect’s Al-Hidayah mosque in central Jakarta are unsure for how many more Fridays they will be able to gather to pray.

The peaceful sect’s 500,000 members in Indonesia face the threat of up to five years’ imprisonment for “tarnishing religion” after a government rebuke last week curtailed their public activities for refusing to accept that Mohammad was the final prophet. The group instead holds up Mirza Ghulam Ahmad, its 19th-century founder, as the last prophet.