Reports are that the explosion was triggered when Motorola upgraded to a Samsung Note 7.
Putin always sends his garbage to do his dirty work. Gotta love this little tidbit from his obituary:
The militant’s family life is controversial, since he has been accused of bigamy. In June 2014 he said he had a wife and a 5-year-old son in Russia. This did not prevent him from marrying a resident of Sloviansk in July, though there is no evidence that he got divorced with the first wife.