A 30-year-old man was arrested for his alleged involvement in a case of armed robbery along Bukit Batok Street 31 on July 8.
The police was alerted at 7:13pm on July 8 to a case of robbery at a commercial unit.
He is believed to have acted alone, the police said.
The suspect allegedly indicated that he had a knife in his bag and showed a female employee at the moneylender a handwritten note saying "this is a robbery".
The woman then surrendered S$22,000 in cash, and the suspect fled the scene with the money.
The police added that the suspect took "proactive steps" to conceal his identity by covering his features. He also supposedly avoided leaving any evidence at the scene.
The suspect was arrested at Lorong 8 Geylang 11 hours later.
Cash amounting to S$18,506, two handwritten notes and a bag were also recovered, the police said.
The police is still trying to recover the rest of the loot and the knife that was allegedly used during the robbery.
The man will be charged on July 10 with armed robbery.
If the crime is committed between 7 pm and 7 am, the man could be sentenced to a term between three to 14 years' jail term, with at least 12 strokes of cane.
If a deadly weapon is used, he could be given not less than 12 additional strokes of the cane.
Top image via SPF