Police have released images of a mother and her two children who have been missing for a month.

Leading Senior Constable Lee Thomson said police are appealing for public assistance to help find Thuy Thi Tran, 27, and her two children Emily and Caysy, aged two and four respectively, who were last seen in St Albans on February 14.

Missing mother Thuy Thi Tran. Image: Victoria Police

Missing mother Thuy Thi Tran. Image: Victoria Police

Police hold concerns for the family’s welfare as the children require medical attention.

Leading Senior Constable Thomson said Thuy and her children often spend time in St Albans, Sunshine, Avondale Heights and Richmond.

Caysy and Emily Nguyen. Image: Victoria Police

Caysy and Emily Nguyen. Image: Victoria Police

Anyone with information on their whereabouts is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.