Police are investigating after two St Marys jewellery stores were broken into this week, NSW Police say.
About 3.45am on Tuesday 19 September 2017, two men on a black motorcycle with their faces covered, approached the front entrance of a shopping centre on Charles Hackett Drive.
One of the men used a hammer to smash the front doors of the centre before they entered and went to a nearby jewellery store.
The men then smashed a glass display window and stole jewellery before they left the centre on the motorcycle.
Two days later about 2.30am today, two men also with their faces covered, smashed the glass front doors of the same shopping centre.
The men entered the centre and went to another jewellery store inside the complex, before smashing a display window and removing an amount of jewellery.
The two men went back to the entrance and were last seen leaving on a motorcycle towards Charles Hackett Drive.
Officers from St Marys Local Area Command are investigating both incidents and have released CCTV images of two men who may be able to assist with inquiries.
Anyone with information is urged to contact St Marys Detectives or Crime Stoppers.