Stoke City have launched what they describe as a "full internal investigation" after striker Kenwyne Jones was reported to have found a pig's head in his locker at the club's training ground. The Daily Telegraph website reports that the Trinidad and Tobago international smashed the windscreen of team-mate Glenn Whelan's car, believing him to have been responsible. It has also been reported that Jones, who is a devout Christian, took umbrage with the prank due to religious reasons, but it is understood he was instead offended at the use of a dead animal.said in a statement: "The club takes seriously reports of an incident at the training ground this afternoon. "A full internal investigation will be carried out and those responsible for any unacceptable behaviour will be dealt with in accordance with the club's disciplinary procedures." The matter was not raised at manager Tony Pulis's routine pre-match media conference, which was also held at the Clayton Wood facility about a mile off junction 15 of the M6.