Usually fuel leaks or the fuel tank gets damaged and some sort of explosion happens - or a fire albeit possibly small.
Had there been an explosion - there would be a very high count of fatalities - even an aviation expert on the news is surprised there was no fire/explosion - it's a miracle.
Amount of injuries or possible fatalities is unknown at present. There was no explosion or fire following the crash and there are reports the engine was spluttering and then cut out before the crash.
Thoughts with those involved.