TORONTO – Research In Motion is shutting the doors to its North American retail stores, a source says, while a separate report suggests the BlackBerry-maker is about to cut another 3,000 jobs.

The Waterloo, Ont.-based company declined to confirm a report from online magazine Cantech Letter which says further workforce reductions will be revealed on Aug. 13.

According to the report, the cuts would be in addition to the 5,000 layoffs the company announced earlier this year.

RIM has been making drastic reductions across its operations to help counter faltering sales of its smartphones, particularly in North America.

The company confirmed it has closed its Boston retail store, while a source familiar with its retail presence said that its last-existing storefront and nine airport locations would also soon shut down.

RIM has been working to turn around its operations after watching its market share erode as consumers switched to Apple’s iPhone and other smartphones running Google’s Android operating system.