In a 2010 publication, Ian Hancock stated that he agrees with the view that the number of Romanies killed has been underestimated as a result of being grouped with others in Nazi records under headings such as "remainder to be liquidated", "hangers-on", and "partisans". He notes recent evidence such as the previously obscure Lety concentration camp in the Czech Republic and Ackovic's revised estimates of Romani killed by the Ustaše as high as 80,000–100,000. These numbers suggest that previous estimates have been grossly underrepresented.