A woman got on a bus without paying at the Tower Ramparts bus station in Ipswich and started “shouting and fighting” with another passenger, police investigating a claim of common assault have said.

The bus driver contacted police at around 8.45pm last Friday to report the assault.

By the time officers had arrived the woman had left the bus and had headed off towards Providence Street.

Despite a police search, she was not found.

Police want to speak to the woman involved. She is described as white, aged in her 30s to 40s, of medium to large build, with dark greying hair and wearing black trousers.

Witnesses or anyone with information are urged to call police on 101.