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Caption: 
MAS has issued a 10-year prohibition order against Tim Leissner (top left), and said it is seeking prohibition orders against (clockwise, from top right) Jens Sturzenegger, Yak Yew Chee and Yvonne Seah Yew Foong.
Credits: 
PHOTOS: WIREIMAGE, WONG KWAI CHOW, CHEW SENG KIM, KEVIN LIM