More trouble for Air Miles

Air Miles has posted a letter on its website warning that criminals have stolen cash miles from some of its members.

The company says a number of in-store transactions have occurred in which the criminals used stolen miles to buy goods, but no specific numbers were given.

A company spokesperson says they're not sharing more specific details because its investigation of the breach is ongoing. 

Cash miles options for in-store purchases has temporarily been suspended, but members can still access their cash miles at the company's website to redeem for e-vouchers.

The alert comes a few weeks after Air Miles sent a note to its members apologizing for the controversy it caused last year over changes to its expiration policy.