As the 2 officers and 2 occupants attempted to leave the property, they found that the front door had swung shut and locked them in the building.
Wrth i’r tri swyddog a’r ddau breswyliwr geisio gadael y fflat, darganfyddon nhw fod y drws ffrynt wedi cau ac wedi eu cloi o du fewn y fflat.