Three men have been arrested after they allegedly robbed a woman and locked her and her child on a balcony at Marina Bay Sands (MBS) in Singapore.The police said on Tuesday that they were alerted at about 7pm the day before to a case of robbery with hurt along Bayfront Avenue.According to preliminary investigations, a 45-year-old woman visited the area after agreeing to exchange S$50,000 (US$39,000) worth of cash for foreign currency with someone she spoke to on a messaging platform.The...