Elon Musk, the world’s richest man, blamed fellow billionaires George Soros, Reid Hoffman and the ActBlue fundraising organization over recent protests targeting his firm Tesla, citing an “investigation”—though it’s unclear what investigation he’s referencing.

Drivers like Lopez have been keeping an eye on a string of reports of anti-Tesla vandalism across the country. In Colorado, a woman was found with explosives at a Tesla dealership in Loveland. Police believe she is connected to recent vandalism involving graffiti on cars at the location.

Hundreds of people gathered outside Portland’s Tesla dealership during the afternoon rush hour on Monday, March 3, chanting and waving signs with messages like “Stop Musk’s coup,” “We Didn’t Elect Elon,

Police don’t yet know the motive behind the shooting at the dealership, 10069 S.W. Cascade Ave., but acknowledged that the attack could be political. The electric carmaker’s owner, Elon Musk, has embarked on a controversial purge of federal workers through the Department of Government Efficiency.

Investigators believe at least seven shots were fired, damaging three cars and shattering windows, Tigard police said in a statement. One bullet went through an office wall and into a computer monitor. Tigard is about 10 miles (16 kilometers) southwest of Portland.