The huge chemical explosion that hit Beirut’s port, devastating large parts of the Lebanese capital city and claiming over 150 lives, left a 43-meter (141 foot) deep crater, a security official said Sunday.

“The explosion in the port left a crater 43 meters deep” Tuesday, the official told AFP, citing reports by French experts conducting an assessment of the disaster area.

The blast was triggered by a fire in a port warehouse, where a huge shipment of hazardous ammonium nitrate, a chemical that can be used as a fertilizer or as an explosive, had languished for years, according to authorities.

The huge explosion also wounded at least 6,000 people and displaced more than 300,000 from their destroyed or damaged homes.