TORONTO - Research in Motion says it has fixed the technical problem that was causing some of its BlackBerry smartphone customers in North America to experience delays receiving email.

But RIM says some customers may still be experiencing delays as the email queues that allow them receive their mail are being processed

RIM says it's continuing to investigate the cause of the problem has apologized for the inconvenience to its customers.

The Waterloo, Ont.-based company said BlackBerry phone, Internet browsing and texting weren't affected by the problem.

The last time RIM's BlackBerry service had a major outage was in February 2008, when an upgrade to the wireless system appeared to have been behind a three-hour service disruption affecting millions of users in North America.

RIM is scheduled to release its third-quarter earnings later in the day.