On Thursday, July 7, the suspect had walked into the Singapore’s Standard Charted Bank's Holland Village branch around 11.25am, handed the female teller a note with his demands and later fled on foot with about $22,000 in cash.
Chinese newspaper Shin Min Daily News reported that the note said: "This is a robbery, I have a weapon, give me money, don’t call police."
The teller handed over the money for fear that the man would use his weapon. She then alerted the police shortly afterwards.
The StanChart branch did not have a security guard then, but a bank spokesman said it had "in-branch security measures" such as closed-circuit television cameras.
The thief left for Bangkok on the same day shortly after the crime was reported, the Singapore Police Force said on Monday.
The suspect involved in the robbery has been arrested by the Royal Thai Police (RTP) on Sunday, announced Singapore Police Force (SPF) in a statement on Monday. Now he is in detention in Thailand's Immigration Department.
SPF said the police were informed of the robbery after the suspect had left the scene. Through investigations, the police managed to establish the identity of the suspect on the same day.
The suspect was making his first visit to Singapore, according to Police Major-General Apichat Suriboonya, who is the head of Interpol Bangkok. But he had been to Thailand "many times", according to records.
Suriboonya revealed more details about the arrest. The suspect is a Canadian, who flew from Singapore to Thailand on July 7, arriving at 5:08 p.m., and he was arrested at noon in Bangkok.
Bank robberies are rare in Singapore, whose tough stance against crime and strict ban on private gun ownership have made it one of Asia’s safest cities.