At around 10:10pm, three men escaped after breaking a glass door. Met officers detained one of the men early this morning.
The two men outstanding are 20-year-old Adil Maxamed and 31-year-old Ramon Martin. Both were patients under the Mental Health Act.
At 10:35pm, the two men entered Tooting Bec station and boarded a Northern Line train. It is not known whether the two have remained together.
Officers are warning the public not to approach them, but to contact them if spotted.