The investigations into the November 26 Mumbai terror attacks have suffered a setback after a key eyewitness became untraceable. The Mumbai Police said on Tuesday that Anita Uddaiya, the woman who had identified the bodies of nine killed Mumbai terrorists, has been missing since January 11. The police have swung into action and are searching for Anita, whose daughter Seema Ketan Joshi filed a complaint after her mother went missing from her house in the Cuffe Parade's Fisherman's Colony.