DETROIT (AP) – U.S. auto safety regulators are investigating engine compartment smoke or fire complaints in two Jeep Cherokees, and air bags that didn’t inflate properly in two Nissan Rogues.

The National Highway Traffic Safety Administration says the Cherokee probe covers 50,000 of the SUVs from the 2015 model year.

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A consumer complained of white smoke from under the hood after turning off the ignition, followed by 20-foot-high flames. Another complained about smoke from under the hood while driving.

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The agency opened the Rogue probe after two complaints that the air bags on 2013 models deployed up to a minute after crashes and either inflated slowly or didn’t fully inflate. The investigation covers about 195,000 vehicles.

Nissan and Fiat Chrysler, which owns Jeep, say they are working with the agency.

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