Police have launched an investigation after they received a call about a man acting inappropriately on a 57 bus.

Merton Police received the call on Tuesday which lead to safer transport units being deployed to patrol the area.

Police from the Roads and Transport department are investigating the allegation while plain clothed officers and uniformed PCSOs are also being employed to assist in the case.

If you saw anything that could assist in the investigation, contact police on 101.