Tesla Inc. Chief Executive Elon Musk violated federal labor law by urging employees not to form a union, the National Labor Relations Board has alleged, according to a new report

Jalopnik reported late Thursday that the NLRB in June filed an amendment to an unfair-labor-practices complaint against Tesla, claiming that in June 2017, Musk met with workers at Tesla’s Fremont, Calif., auto factory and solicited complaints about workplace safety, and promised to address their concerns if they stopped their attempt to unionize.