Two men who were arrested in connection with an assault on a traffic warden have been released on bail.
The suspects escaped on a motorbike
The victim was attacked while on duty outside the Gardeners Arms pub in Chatham Road, Battersea, south-west London, on Wednesday afternoon.
A police spokesman said the 38-year-old warden was in a stable condition with serious head injuries after being beaten with a crash helmet.
The men, who went to police stations voluntarily, were released on Thursday.
Both have been asked to return in August pending inquiries.
The first man is 23-years-old while the second man, who went to a police station a few hours later, is aged 22.
A police spokesman said: "It is believed that possibly two men remonstrated with the parking attendant, who had been issuing tickets in the street.
"The victim had beer thrown into his face and was kicked, and struck on the head with a crash helmet.
"The suspects then made off on a motorcycle."