The National Highway Traffic Safety Administration announced it is investigating nearly 2.6 million Tesla vehicles over a remote driving feature.

The National Highway Traffic Safety Administration said Tesla’s automated summoning feature has been linked to at least four crashes.

The agency has previously investigated earlier versions of Smart Summon, which is meant to let a Tesla vehicle park itself or fetch a driver via remote app command.

The “Actually Smart Summon” feature enables drivers to remotely summon or move their vehicles to them or another location via a mobile phone app.

U.S. regulators have opened an investigation into 2.6 million Teslas after reports of crashes involving the use of company technology that allows drivers to remotely command their vehicle to return to them,

U.S. regulators on Tuesday announced an investigation into 2.6 million Tesla vehicles following reports of crashes linked to technology that enables drivers to use a smartphone app to remotely summon their cars or direct them to another location.