March 27 (Reuters) - Shares of U.S. automakers tumbled in premarket trading on Thursday after U.S. President Donald Trump said he would impose 25% tariffs on all vehicles and foreign-made auto parts imported into the United States.

Shares in Ford F.N dropped 4.3%, General Motors GM.N fell 6.5% and Tesla TSLA.O was down 2.2% by 4:11 a.m. ET.

(Reporting by Sruthi Shankar in Bengaluru; Editing by Mrigank Dhaniwala)

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