Six extensions to alcohol-free zones will be set up in Oxford, city councillors agreed this week.

At present, alcohol-free zones cover much of the city centre and parts of Cowley and Blackbird Leys. Under the new proposals bans will also come into force in Speedwell Street, Broad Street, Frideswide Square, St Aldate's and surrounding towpaths, Walton Street, more areas of Blackbird Leys, and Cowley Road from Union Street to The Plain.

Broad Street in particular, has suffered from the displacement of street drinkers from alcohol-free zones, and the new zones should be in place by the end of the month.

Susan Brown, executive member for crime, said police had used powers to move drinkers on, and warn them that they faced fines of up to £500 on at least 100 occasions.

She added: "More than a third of the occasions when police have taken action have occurred in George Street and bottles have been confiscated. One of our key aims was to ensure that glass bottles could be removed to prevent them from being used as weapons in late-night violence."

"Police have the powers of arrest in these situations but so far they have not had to use them."

Green city councillor Craig Simmons told the meeting that there had been some "displacement" of street drinking into residential side streets in Cowley Road including Princes Street but Ms Brown replied that residents had not yet asked for the alcohol-free zone to be extended to cover these streets.

She did not rule out further extensions of the zones in future.

Alcohol-free zones introduced last year, include:

Cornmarket Street, Queen Street, Bonn Square, New Inn Hall Street, Frewin Court, George Street, Shoe Lane, St Michael's Street, Gloucester Street, Friar's Entry, Magdalen Street, Victoria Court, Red Lion Square, St George's Place, Gloucester Green, Chain Alley, Gloucester Green Bus Station and Gloucester Lane, Little Clarendon Street and Wellington Square, Blackbird Leys Shopping Parade, Magdalen Bridge and The Plain, Manzil Way, St Mary and St John Churchyard, Chapel Street, Union Street car park, and the section of Cowley Road from Union Street to Magdalen Road.