Two men aged 52 and 53 were arrested by the police at Block 508 Ang Mo Kio Avenue 8 on 22 March after locking themselves in a HDB flat with their 77-year-old mother.
According to Shin Min Daily News, the two men are brothers, and were arrested for criminal intimidation and suspected drug offences.
A door to door investigation was conducted by CNB officers when the duo refused to cooperate and locked themselves inside the flat.
At about 6.58am, SOC officers, the Crisis Negotiation Unit and the SCDF were activated to the scene, according to Straits Times.
The two men were assessed to be a danger to themselves and their elderly mother, and the SOC later broke into the flat and arrested the two men at 11.55am.