Two Samsung Galaxy Note 7 smartphones have reportedly caught fire in China in what, if confirmed, would be the first such incidents in that country.
A user of Chinese social media posted messages on Sunday saying a friend's Note 7 caught fire over the weekend.
And South Korean and Chinese news reports said a second Note 7 user reported that a phone exploded on Sunday.
Samsung has announced a recall for some phones in China.
But it says other sales will go ahead because the Note 7 sold in China uses a different battery from those linked to problems elsewhere.
Samsung did not respond to emails seeking comment.