U.S. regulators may launch an investigation into Tesla's newly released driver-assistance feature over concerns that it could lead to crashes.

The U.S. National Highway Traffic Safety Administration (NHTSA) on Monday began a preliminary evaluation of about 2.6 million Tesla vehicles following reports of problems with a feature called Advanced Intelligent Summon (Actually Smart Summon, ASS).

According to a document posted on the NHTSA's official website, the agency received a complaint alleging that Tesla's ASS feature caused a crash, in addition to at least three other media reports of similar incidents.

Actually Smart Summon, which Tesla introduced late last year, allows owners to use a smartphone app to remotely move their vehicles in parking lots or other locations.

The NHTSA said some vehicles failed to detect a marker or other parked vehicle while using the feature, leading to accidents, while other users were too rushed to avoid a crash.