A 45-year-old prime witness in the 1993 Mumbai bomb blasts case was yesterday arrested by the Versova police for trying to rape a 34-year-old woman, a day after she lodged a complaint with them.

The accused, Usman Jaan Khan, had earlier been arrested in the 1993 blasts case, but was later produced in court as a prime witness by the city police. Police officials said that Khan was known to the victim and her family who, like him, stayed in Versova. He had visited her house and she his, along with her husband, many times.