Stade Roland Garros was used as an internment camp at the start of World War II . Paris-based research center holds evidence from former political prisoners . Comment: Official documents reject claims that it was used to hold Jews before deportation .
Stade Roland Garros was used as an internment camp at the start of World War II . Paris-based research center holds evidence from former political prisoners . Author Arthur Koestler was held at the tennis stadium in French capital . Official documents reject claims that it was used to hold Jews before deportation .