Dec 21 (Reuters) - Another wave of layoffs are coming at electric-car maker Tesla Inc (TSLA.O) in the next quarter, news website Electrek reported on Wednesday, citing a source familiar with the matter.The company did not immediately respond to a Reuters request for comment.The reported move comes at a time when Tesla investors have raised concerns over Chief Executive Elon Musk's distraction with managing Twitter, the social media platform he bought for $44 billion in October.Moreover, Tesla analysts have also cut their price targets on the stock worried that weakness in demand from China will weigh on the EV maker's deliveries next year.read moreMusk in June said Tesla would reduce its salaried workforce by roughly 10% over the next three months."