![Beirut, Lebanon.- In the photo taken on August 4, 2020, a large blast has hit the Lebanese capital, Beirut, ahead of the verdict in a trial over the killing of ex-PM Rafik Hariri in 2005. Reports say the explosion was in the port area of the city, with unconfirmed reports of a second blast. It is not clear what caused them.](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/OK6SLN2UMUSLHPJWEZ5HWO2RNM.jpg?smart=true&auth=89ce8d70885285f1f4442a3a6cca6441d4e1569b15b3c1e49e13325325c294da&width=400&height=225)
The blast at Beirut port on August 4, 2020 was caused by tonnes of highly explosive ammonium nitrate stored there since 2013. Reuters
The blast at Beirut port on August 4, 2020 was caused by tonnes of highly explosive ammonium nitrate stored there since 2013. Reuters
Beirut port blast: freed whistleblower returns to work despite alleged intimidation
Port official Joseph Naddaf said he was threatened weeks before the explosion