ACT Police are seeking witnesses to an unprovoked assault of an elderly man in Woden on Saturday.

At 3.50pm officers were called to the Woden shopping centre following reports of an elderly man being assaulted by two teens near the Woden Square entrance.

Centre security staff arrived, and the teens allegedly began assaulting them.

Soon after, a 16-year-old and 17-year-old boy were located by police on Corinna Street and were arrested.

The 16-year-old has been charged with affray, assault, fighting in a public place, and three counts of breaching a good behaviour order.

Enquiries relating to the 17-year-old are continuing.

Police have already spoke with several witnesses, but would still like to speak to anyone who witnessed the incident and who has not yet spoken to police.

Anyone with information should call 1800 333000.