The KCRC said yesterday it was investigating the origin of a video e-mail sent to the corporation and several newspapers allegedly showing footage of a bikini-dressed woman dancing at a banquet for its executives. The e-mail, entitled 'KCRC Anniversary Dinner', claimed several senior executives from the rail company were among the audience, an allegation denied by the company which received the e-mail two months ago. 'Our initial probe suggested it was a malicious prank. However, it has been very difficult for staff in our IT division to find out who its sender is,' a spokesman said.