Bangladesh is investigating the possibility that a man who studied at the University of NSW, and then lived in Sydney with his Australian wife and young child, may have links to a deadly attack in a Dhaka cafe early this month. 
Twenty hostages, two police officers and six militants were killed in the attack when men with bombs and guns burst into the Holey Artisan Bakery in Dhaka on   July 1. They began firing indiscriminately and detonated several bombs. Eighteen of those killed were foreigners.
It marked a steep escalation in violence in Bangladesh where -Islamist militants have murdered secular bloggers, academics and non-Muslims.
The New York Times reported that a list of "high value suspects" was released which contained long-time residents of Canada, Japan and Australia, "who have long been sought and suspected of setting up training and recruitment pipelines for Islamic State".
The name Abu Terek Mohammad Tajuddin Kausar was on that list. Dhaka journalist Maher Satter said he spoke to Mr Tajuddin's mother, Tahera Begum, who said that her son has been living in Australia for many years after moved here in 2006. "He would return occasionally to see his family but the last time he -returned was in 2013. After that they started to lose touch," Satter said.
Ms Begum said she did not know where her son was living. She said that her son, who studied computer science and engineering, graduated from the UNSW in 2008 with a Masters and that he had then got a job.
"He had a wife and a child and his wife is caucasian Australian," Satter said. Ms Begum, who does not speak English, said her daughter-in-law's name was either Mova Hasana or Moda Hasana. Mr Satter said it seemed that Ms Hasana had changed her name when she married.Other media reports said Mr Tajuddin had two children with his Australian wife and it is -believed he became an Australian citizen after marrying.