Hundreds of thousands of Rohingya muslims in Myanmar are living in concentration camps and urban ghettos like those in Nazi-occupied Europe, a UN investigator has said.

Christopher Sidoti, a member of the UN fact-finding mission into crimes against the Rohingya that last year accused Myanmar’s military of genocide, warned the crisis is far from over for the persecuted minority, reports The Guardian.

Rohingya people remaining in Myanmar live in villages where their movements are severely curtailed and their rights to get married and have children are strictly controlled, he said.

“There are concentration camps – let’s call it what it is – with 128,000 internally displaced people in central Rakhine, outside Sittwe,” said Sidoti. “In Sittwe, there are three areas where Rohingya people live and they have become urban ghettos like those Jews lived in under Nazi-occupied Europe.”

Sidoti, a keynote speaker at a conference on the Rohingya crisis at University College London on Thursday, added: “The mass expulsions and shootings may have stopped, the military may have achieved their purpose – the makeup of the Rakhine state has changed – but the crisis is not over.”

There are only an estimated 400,000 to 500,000 Rohingya left in Myanmar, he said, compared with 2 or 3 million in 2012.

“We said a year ago there were circumstances to give rise to an inference of genocidal intent,” Sidoti said.

His comments came as the UN warned that civilians in Rakhine and Chin states may be suffering fresh war crimes and human rights violations as fighting between military and rebel groups intensified.

Speaking to the UN human rights council (UNHRC), Yanghee Lee, the UN special rapporteur on Myanmar, detailed accounts of abduction and torture of civilians by both the Myanmar army and the rebel insurgent group the Arakan Army, which is fighting for greater autonomy in the region. “The conflict with the Arakan Army in northern Rakhine state and parts of southern Chin state has continued over the past few months and the impact on civilians is devastating,” Lee told the UNHRC on Tuesday. “Many acts of the Tatmadaw [Myanmar armed forces] and the Arakan Army violate international humanitarian law and may amount to war crimes, as well as violating human rights.”