Thomson Reuters
People pass by the Tesla New York City store is seen in the Chelsea neighborhood of New York
The U.S. National Highway Traffic Safety Administration began investigations into the company's Model S luxury electric cars in November after three cars caught fire.
"A defect trend has not been identified," the regulator said on its website.
"The closing of the investigation does not constitute a finding by NHTSA that a safety-related defect does not exist."
(Reporting by Sagarika Jaisinghani in Bangalore; Editing by Kirti Pandey)