Police in Southern California said Tuesday they were seeking additional information about an incident last week that Twitter CEO Elon Musk said prompted him to crack down on accounts that track whereabouts of private jets — including his.

The Dec. 13 incident in a Los Angeles-area highway has become a flashpoint for a debate about online speech and the dissemination of personal information, although authorities had previously said little about what happened.

In a statement Tuesday, police in South Pasadena said that the incident involved a member of Musk’s security team, whose vehicle hit the car of a man he alleged was following him.

The police called the security team member a “suspect.” They did not say what crimes they suspected him of committing, but said they were investigating a report of “an assault with a deadly weapon involving a vehicle.”

Musk’s description of the incident was different. Last week, in justifying his decision to ban the Twitter account @ElonJet, which publishes the location of his private airplane, Musk said that a “stalker” had used location information from the account to follow and confront a car carrying one of his children.

The statement from South Pasadena police, though, contained no mention of a suspected stalker.

“At no time during the incident did the victim identify the suspect or indicate the altercation was anything more than coincidental,” police said.

Business Insider reporter Linette Lopez, who has covered Musk and Tesla for years,…