Research In Motion, maker of the popular BlackBerry smartphone, said last Tuesday it was trying to locate the cause of a service disruption that left subscribers with only intermittent access to e-mail and other data services for three hours.


Service problems started about 3:30 p.m. EST on Monday, and lasted until about 6:30 p.m. EST, RIM said in an e-mailed statement. BlackBerry subscribers, most of whom are business people, did not lose any messages during the interruption, and voice communications were not affected.