BlackBerry's COO, CFO quit in management rejig

After the ouster of CEO Thorsten Heins, Chief Operating Officer Kristian Tear and Chief Marketing Officer Frank Boulben will leave Blackberry. Moreover, chief financial officer Brian Bidulka is being replaced by former senior vice president and controller, James Yersh. Bidulka will remain with the struggling smartphone maker as an adviser for the remainder of the company's fiscal year.