BlackBerry-maker Research in Motion says one of its top executives is on medical leave.
RIM spokeswoman Marisa Conway said Thursday that Chief Operating Officer Don Morrison will be on medical leave until later this year. Larry Conlee, who retired as COO in 2009, will return to the company as a special adviser.
The Canadian company is due to release its quarterly earnings after markets close Thursday.
RIM's stock is off 50 percent from its 52-week high. In April, the company slashed earnings and sales forecasts as it faces increased competition from Apple's iPhone and devices that run on Google's Android operating system.