Victoria police believe a masseur charged with sexual assault has more victims that have not yet spoken to investigators and is asking them to come forward to assist their investigation.

Police arrested Ajesh Jacob, 35, on May 13 after an investigation was launched in March when a victim came forward with allegations of sexual assault.

Jacob, who goes by the name Sam, has been charged with one count of sexual assault stemming from an incident at a massage and reflexology business in the