A model poses for photographs with a Galaxy Note 7 during its launching ceremony in Seoul, August 11, 2016. REUTERS/Kim Hong-Ji

Samsung Electronics Co. has fumbled again in response to safety concerns over its Galaxy Note 7, the Wall Street Journal reported.

The world’s biggest smartphone maker told owners to stop using the model, halting production and distribution pending a US investigation into reports of overheating battering on models that the company had earlier assured consumers were safe. That included a warning for consumers who had already received a replacement for defective models that they should turn the handsets off.

Consumers with either an original or a replacement Note 7 should power down and stop using the device, said Samsung.