Robin van Persie will not be available for Manchester United's game against West Ham on Saturday

Van Persie went down holding his knee. Photo: PA

Robin van Persie will not be available for Manchester United's game against West Ham on Saturday, manager David Moyes has confirmed.

Van Persie was carried off on a stretcher in the dying minutes of United's 3-0 win over Olympiacos with a knee injury.

United are unsure how long Van Persie will be out for, but the striker will definitely miss Saturday evening's game at Upton Park.

"We are getting him re-scanned again on Friday because there was nothing conclusive." the United boss said.

"He won't be available for Saturday's game.

"We will give you an update as soon as we can."