According to the victim – Brianna Olivas, on Twitter, says the phone was not charging and there is no explanation how this has happened. Smoke was the first indication something was wrong with the iPhone, and seconds later its metal shell burst with even more smoke.
Obviously, there was an issue with the battery, which swelled, caught on fire, and then broke the phone. Luckily, nobody was hurt by the phone and there are no property damages.
This incident reminds me of the Samsung Galaxy Note 7 fire saga. It was really a bad one for the company as a whole.
Anyway, Apple has contacted the victim Briannas Olivas on getting to investigate the cause of the blowing up.