There is a possibility of external interference
The cause of the explosion has not yet been established, as there is a possibility of external interference, Lebanese President Michel Aoun noted.
"The cause has not been determined yet. There is a possibility of external interference through a rocket or bomb or other act," quoting President Michel Aoun.
He said the probe into a blast at a warehouse housing highly-explosive material was being conducted on three levels.
"First, how the explosive material entered and was stored ... second whether the explosion was a result of negligence or an accident ... and third the possibility that there was external interference."