Police investigate kidnap tip-offs
Armed and masked men broke into Ms Melchers's home in the Old South section of Amsterdam on Monday night, bound and gagged a friend and seized the 37-year-old woman. Her two young children were not harmed. The motive for the abduction is as yet unknown.
Police said they received nine tips from the public after a TV plea late on Tuesday by Willem Woelders, the police commissioner, asking for information.
Ms Melchers, who runs a catering company from her home, is the daughter of Hans Melchers, owner of Melchemie Holland, which supplied chemicals to Iraq in the 1980s.