Brazil supreme court justice Alexandre de Moraes has opened an inquiry into whether Elon Musk obstructed justice, escalating a spat with the billionaire over his social media platform X.

Moraes said in a document released by the court that the billionaire “started a disinformation campaign” and that X — formerly known as Twitter — is committing abuse of economic power in order to “illegally influence public opinion”. Musk was also added to a criminal inquiry that investigates anti-democratic acts by so-called “digital militias”.

The court’s response comes after Musk said he would defy court orders and lift restrictions imposed on some X accounts in Brazil. The billionaire targeted Moraes in several of his social media posts during the weekend, accusing the justice of betraying the constitution and calling for his impeachment.

It’s unclear which accounts Musk was referring to when he said he would disobey the court’s order. As of Sunday night, a number of accounts linked to right-wing Brazilian entrepreneurs, former politicians and digital influencers remained blocked.

Read: Elon Musk reverses course on blue checkmarks on X

In his Saturday post, Musk also said that the Brazilian court was threatening to cut off access to X in the country. Local news media reported on Sunday that network operators were warned by regulator agency Anatel of a possible need to take down access to the X platform. — Dayanne Sousa and Daniel Carvalho, (c) 2024 Bloomberg LP