11 December 2012 Last updated at 10:08 ET

Boy arrested over Manchester derby racist tweet

A 15-year-old has been arrested by police investigating a racist tweet sent during Sunday's Manchester derby.

The teenager was held on Monday night on suspicion of a racially aggravated public order offence, Greater Manchester Police said.

An investigation was launched after a message was directed at a Manchester United player. The boy has been bailed pending further inquiries.

United defender Rio Ferdinand was injured during the match.

He was left with a cut to his left eyebrow after being hit by a 2p coin while celebrating his team's winning goal at the Etihad Stadium.

Nine people were charged after the match between Manchester City and Manchester United on Sunday.

One of those was City fan Matthew Stott, 21, from Knutsford, Cheshire, who had to be restrained by goalkeeper Joe Hart as he tried to confront Ferdinand.

All nine are due to appear before Manchester City Magistrates' Court on 4 January.

Police have appealed for anyone with information about people throwing coins to contact them.