A 15-year-old boy has been cautioned after posting a racist tweet aimed at Arsenal striker Danny Welbeck . The teenager took to social media after Welbeck scored the winner to knock his former club Manchester United out of the FA Cup on March 9 . He posted a vile , racist rant under the username @ angeIsleftfoot which read : 'Welbeck is dead to me , the f****** c***… ’ Danny Welbeck scored the winner as Arsenal beat Manchester United in the FA Cup quarter-final in March . The tweet , posted after Welbeck 's decisive role in Arsenal 's victory at Old Trafford , continued with sickening references that are too offensive to publish here . After a fellow Twitter user complained , officers from Greater Manchester Police launched a probe . They identified the user and passed on the information to Wiltshire Police , who made an arrest . Welbeck was the subject of a racist tweet after the game by a 15-year-old boy , who has now been cautioned . The teenager has now been given a caution and warned about his behaviour . A spokesman for Wiltshere Police said : ' A 15-year-old boy , from the Salisbury area , has been given a youth caution following the appearance of a racist tweet aimed at a former Manchester United player placed on social media on the evening of Monday , March 9 . ' The Twitter handle was removed from the site following the complaint .
Arsenal beat Manchester United 2-1 in the FA Cup quarter-final on March 9 . Danny Welbeck scored the winning goal for Arsenal against United . TL;DR The Premier League champions have won their first four games of this season and are top of Group A after beating West Ham 2-0 at Upton Park on Saturday.