Tesla Inc. Chief Executive Officer Elon Musk has assumed oversight of sales in Europe and the US, leaving deputy and senior vice president Tom Zhu over Asia, following the high profile departure of Omead Afshar,

Elon Musk has reportedly fired Omead Afshar, the head of Tesla’s North American and Europe operations and a longtime top ally, after a prolonged sales slump across the two regions.

Tesla chief executive Elon Musk has assumed oversight of sales in Europe and the U.S. following the high-profile departure of Omead Afshar, Bloomberg News reported on Tuesday, citing people familiar with the matter.