The 20-year-old, who has agreed a long-term deal with the Gunners, was a free agent after his contract with Ligue 1 outfit Auxerre expired. Sanogo is currently playing for France at the FIFA Under-20 World Cup in Turkey, scoring twice in the group stages to help his side through to the last 16, where they face the host nation. Arsenal manager Arsene Wenger is pleased to have captured the services of Sanogo, who scored 11 goals in 24 appearances with Auxerre after joining the club as a 14-year-old. Wenger said on www.arsenal.com: “Sanogo is a good young signing for us. He has shown that he has potential with his recent performances for Auxerre and also for the France Under-20 side. We are looking forward to Yaya joining us and continuing his promising development.” The Barclays Premier League club confirmed that the deal is subject to the completion of formal registration processes, with Sanogo set to join up with his new colleagues once his international commitments at the Under-20 World Cup are over . Meanwhile, Jack Wilshere believes if the Gunners were to sign England team-mate Wayne Rooney it would strike fear into the hearts of their Premier League title rivals. Rooney asked to leave Manchester United at the end of last season but it remains to be seen how the situation will develop with the arrival of new manager David Moyes, his former boss at Everton. Speaking in a question and answer session with www.espnfc.com, Wilshere said: “If it happens, it would be amazing. He (Rooney) is the type of player who can win you trophies – and just to see his name on the team sheet brings fear to the opposition. We could do with a little more of that.” Press Association Arsenal have confirmed the signing of France youth international attacker Yaya Sanogo.