The firm's chief financial officer left last month
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Price competition and a poor reception for its latest mobile phones have hit Motorola sales and pushed it into the red for the past three months.
It made a $181m (£90.2m) loss between January and March, compared to a $686m profit in the same period last year. Sales fell from $9.6bn to $9.4bn.
Motorola warned investors last month that it would make a quarterly loss and reduced its yearly profit forecasts.
It has been under pressure after a succession of disappointing results.