Blackberry recently announced a 40% cut in its workforce
Shares in struggling smartphone maker Blackberry have fallen 16% after it announced it had abandoned a plan to sell itself to its biggest shareholder, Fairfax Financial Holdings.
Instead, it intends to raise $1bn (£627m) in fresh financing.
Chief executive Thorsten Heins will step down and former Sybase chief executive John Chen will serve as interim chief executive.
Last month, Blackberry reported a second-quarter net loss of $965m.
Those losses were blamed on poor sales of its new smartphone, the Z10.