Research in Motion has lost a number of senior-level executives in recent days amid a broad review of the company’s strategic options, The Wall Street Journal reported on Thursday. Alistair Mitchell, RIM’s vice president of the BlackBerry Messenger instant-messaging platform, is among several executives who have left the company according to the report. A company spokeswoman confirmed to the Journal that Mitchell is “no longer with RIM.” The spokeswoman also confirmed that Alan Brenner, a senior vice president of the BlackBerry platform, would be “leaving the company after a transition period.” RIM posted disappointing fourth quarter sales last week, leading to the departure of company co-founder Jim Balsillie, chief technology officer David Yach and chief operating officer Jim Rowan. The struggling company said it is facing significant challenges, and it is currently reviewing strategic opportunities and potential partnerships.

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Dan joins the BGR team as the Android Editor, covering all things relating to Google’s premiere operating system. His work has appeared on Fox News, Fox Business and Yahoo News, among other publications. When he isn’t testing the latest devices or apps, he can be found enjoying the sights and sounds of New York City.