Kolo Toure became Manchester City's latest big-money signing on Wednesday as the Ivory Coast defender completed his move from Arsenal.

The 28-year-old passed a medical before putting pen to paper on a four-year contract worth an estimated #100 000 a week.

"Manchester City are delighted to announce that Kolo Toure has joined from Arsenal," a statement on City's website confirmed.

The central defender who spent seven years with the Gunners has signed a four-year contract and becomes the sixth summer signing.

City manager Mark Hughes turned to Toure after Chelsea captain John Terry rejected a move to Eastlands and Gunners boss Arsene Wenger, who signed Belgian defender Thomas Vermaelen from Ajax in June, decided to accept the bid of around #15-million.

"I am delighted to welcome Kolo to Manchester City," Hughes said. "It is no secret that we have been looking to strengthen our defence and in Kolo I feel we have recruited a world class player.

"He brings a wealth of Premier League experience from his seven seasons with Arsenal.

"Kolo has been a central figure in a very strong Arsenal team for many years and I have been an admirer of him for a long time.

"He is strong, quick, reads the game well and will be an influential figure in the dressing room."

Toure is City's sixth signing of the close-season, joining former Arsenal team-mate Emmanuel Adebayor, Carlos Tevez, Roque Santa Cruz, Gareth Barry and goalkeeper Stuart Taylor.

Hughes, backed by the club's billionaire Abu Dhabi-based owners, has now spent nearly #100-million on new players as he tries to establish City as a top four team in the Premier League.

Toure struggled to find his best form last season after returning from the African Nations Cup and found himself played at right-back before being briefly dropped.

But the Ivorian, who arrived at Arsenal in 2002, was a member of the 'Invincibles' team that went through the entire 38-game Premier League campaign in 2003-04 without losing a match.

Meanwhile, City defender Nedum Onuoha signed a new five-year contract with the club on Wednesday to end reports he may move to Everton as part of a swap deal for Joleon Lescott.

Onuoha, 22, told City's website: "This is a season that we will be looking right towards the top of the table. Who knows how far the club can go. We feel anything is possible.

"There is a brilliant mix here in terms of the squad. There are a lot of big signings that have been made but there are also plenty of lads who have come through the academy and I think that is an important thing."