Hundreds of Indonesians are believed to have gone to join IS and those who survived the conflict are mostly being held in camps in Syria under Kurdish authorities.

The Indonesian government has floated plans to repatriate citizens from the war-torn country, and enrol them in deradicalisation programmes, but concerns remain they may bring home violent, extremist ideology or combat skills with them.

Teuku Faizasyah, a spokesman for the Indonesian foreign ministry, said the embassy in Damascus was trying to verify a report carried in the Kurdish Hawar news agency that the woman, who was reportedly six months pregnant, had been beaten to death in the al-Hol camp, which is home to thousands of refugees.

“The conflict and armed violence in Syria makes the verification process harder and complex,” he told Reuters in a text message.