CANBERRA, Australia (AP) China appears to be expanding its network of secret detention centers in Xinjiang, where predominantly Muslim minorities are targeted in a forced assimilation campaign, and more of the facilities resemble prisons, an Australian think tank has found.

The Australian Strategic Policy Institute used satellite images and official construction tender documents to map more than 380 suspected detention facilities in the far northwestern region, highlighting internment camps, detention centers and prisons that have been newly built or expanded since 2017.

The report builds on evidence that China has made a policy shift from detaining Uighurs and other largely Muslim minorities in makeshift public buildings to constructing permanent mass detention facilities.

This is despite Chinese state news agency Xinhua reporting late last year that trainees attending vocational education and training centers meant to deradicalize them had all graduated.