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 .
Teenager has been cautioned after posting racist tweet aimed at Welbeck .