BlackBerry Ltd warned that it expects to report a huge second-quarter operating loss next week and that it plans to cut more than a third of its workforce.
The company, which has struggled to claw back market share from the likes of Apple's iPhone, Samsung Electronics Co Ltd's Galaxy phones, said it expects to report a net operating loss of about $950 million to $995 million (£621.1m) in the quarter ended August 31, due to writedowns and other factors.
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Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.
The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.