The British campaign group "Led By Donkeys" has claimed responsibility for the stunt that authorities say may have breached German laws on the use of symbols linked to illegal organizations.

They projected the words “heil” and “boycott” alongside the large Tesla logo, as if to read “heil Tesla” or “boycott Tesla" on to the nine meter high building on Wednesday night

An activist group projected a photo of billionaire Elon Musk making a controversial gesture that resembled a Roman salute on a Tesla factory near Berlin this week, with a single word above the world’s richest man: “Heil.