VIENNA, April 16 (Reuters) - Austria's anti-corruption prosecutor has opened an investigation into Rene Benko, head of the crisis-ridden Signa property group, on suspicion of fraud, ORF radio reported on Tuesday.

The prosecutor's office and Benko's legal team were not immediately available for comment. (Reporting by Alexandra Schwarz-Goerlich, writing by Andrey Sychev, editing by Rachel More)