As a number of new products come on stream, Apple is warning resellers that many of its core products may be in short supply in the next few weeks.

Reports suggest that a memo to resellers from Apple distributed says the company has begun reducing production of current-generation iPods, 13in MacBooks and 15in and 17in MacBook Pros.

According to the report Apple has "strongly suggested" resellers should immediately purchase enough iPods to last them for four weeks.

Resellers are also being advised to purchase three weeks worth of MacBook supplies.

Rumours of an upgrade to the MacBook and MacBook Pro range have been rife, with many speculating that the new models will sport new keyboards, aluminium MacBook-Air style casing, new processors and a glass trackpack similar to the screen on the iPhone.

Apple is also expected to introduce a new range of iPods.

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