Tesla investors urged Musk to apologize in an open letter on Tuesday, warning him that his actions were “shaking investor confidence.”

Gene Munster, a managing partner at venture capital firm Loup Ventures, said he wrote the letter on behalf of Tesla investors due to Musk’s “concerning” behavior over the last six months.

\"PHOTO:
Lauren DeCicca/Getty Images
PHOTO: Monks lead out family members of the boys from the cave site after a morning prayer on July 7, 2018 in Chiang Rai, Thailand.
>

“The exchange with Vern Unsworth crossed the line. I suspect you would agree given you deleted the string from Twitter, but it will take more than that to regain investor confidence,” Munster, a longtime tech investor, wrote. “Your behavior is fueling an unhelpful perception of your leadership – thin-skinned and short-tempered.”

Musk acknowledged that his actions were unjustifiable.

“His actions against me do not justify my actions against him and for that I apologize to Mr. Unsworth and to the companies I represent as leader,” Musk said. \"The fault is mine and mine alone.”

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