Car giant Toyota has received over 180 complaints in the US and Japan about braking problems in its Prius hybrid model.
On Wednesday, the number of complaints received by the manufacturer stood at 100.
Toyota is undergoing a crisis situation, having had to recall millions of vehicles in eight other models over accelerator pedal problems recently.
Meanwhile, US transportation secretary Ray LaHood retracted his previous comment that Americans should not drive their recalled Toyotas unless on their way to dealers for accelerator repairs.
Toyota did not comment on Mr LaHood's remarks, but said it will explain the Prius braking problems. However, no details are available currently.
The Japanese media reported that Toyota has been repairing electronic problems with the latest Prius model's brake systems, which has raised questions regarding the thousands of Priuses in use by motorists now.
About 4.5 million vehicles around the world were recalled by the company recently over accelerator pedals. The new Prius models released in the US and Japan in May last year were not part of the recall.
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