The probe into this month's devastating blast in Beirut is "very complex" and will not be finished quickly, Lebanese President Michel Aoun said Sunday.
The cause of the fire that ignited nearly 3,000 tons of ammonium nitrate stored at Beirut's port remains unclear.
Aoun said the probe is divided into three parts. The first aims to determine the circumstances surrounding the cargo, the second where it came from and who shipped it and the third to find who was responsible for handling and securing it.
