Witnesses have been urged to come forward after an 18-year-old man allegedly acted indecently and assaulted several people at Belconnen Mall on Saturday night.

At about 5:15pm on Saturday the man allegedly removed his clothing and ran through Belconnen Mall, assaulted multiple people and acted indecently in the presence of others, including young children.

Police, security officers, and a member of the public eventually restrained the man.

Police are asking anyone who witnessed the incident, was assaulted by the man or has footage of the incident to contact Crime Stoppers