Gwent Police is advising residents to extra vigilant after two properties in the Waterloo and Draethen areas were broken into.
A house in Waterloo, Machen, was burgled sometime between 7pm and 11.30pm on Monday January 30, and jewellery was stolen.
A house in Draethen was also broken into between 10.30am and 6.30pm on Wednesday February 8.
Officers are investigating both incidents and increasing patrols in the area.
Anyone with concerns or information relating to these incidents can call Gwent Police on 101.