The National Highway Traffic Safety Administration said on Tuesday it has opened a probe into 2.6 million Tesla vehicles in the United States over reports of crashes involving a feature that allows users to move their cars remotely.

Four crashes that occurred while Tesla's self-named Actually Smart Summon feature prompted the NHTSA's safety investigation.

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 is probing about 2.6 million Teslas after regulators discovered that a feature on multiple vehicle models was tied to crashes. The feature, known as "Actually Smart Summon" is intended to have the car park itself and pick up its owner using a button on the Tesla app.

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.