The graffiti tag causing outrage around Norwich has struck again after a train carriage at Norwich rail station, pictured, has had the word 'shook' scrawled on it.

It took less than an hour for an Evening News investigation to find 35 locations scrawled with the distinctive signature around the city last week.

If found guilty the people responsible could face a fine of up to �5,000, and potentially even jail.

Yet an appeal for the culprit to come forward and stop covering the city doesn't seem to have deterred people from blighting our city with the graffiti tag, as this picture shows.

A National Express East Anglia spokesman said: 'Graffiti vandalism is not a harmless pastime. It is an extremely dangerous practice and criminal act, and causes the rail industry to incur significant additional costs.

'We keep a record of graffiti tags and liaise with the British Transport Police to identify those responsible and to seek prosecutions for their unacceptable actions.

'Those intent on vandalising trains and station property with graffiti cause unnecessary inconvenience to our customers and staff. Any train found with graffiti is taken out of service at the earliest opportunity for cleaning.'

Do you know who is behind the 'shook' tag or do you live in an area where graffiti is particularly bad? Contact our crime correspondent Ben Kendall on 01603 772423 or email ben.kendall@archant.co.uk