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 person, who claimed to offer foreign currency exchange services, instructed the victim to bring the cash there and said the exchanged amount would be deposited into her e-wallet.

The victim, who was accompanied by her child, met a man near Bayfront Avenue and was brought to a hotel room, said the Singapore Police Force (SPF) in a press release.

A second man was waiting in the room’s bathroom, they added.