Report says, the huge explosion in Beirut, Lebanon, which has killed over 100 people and injured more than 4,000, was caused by a welder at work.
It was gathered that there was "highly explosive sodium nitrate" Closed to where the welder was working.
The ammonium nitrate - more than 2,750 tons was confiscated from a ship by Lebanese authorities and placed in one of the warehouses located near the harbour over six years ago.
Security sources in the country have claimed the welder sparked the initial fire that in turn ignited the chemicals, causing a blast that has been compared to a "nuclear bomb".
Many people are feared to still be trapped under the rubble, including those trapped inside their damaged homes.
As at this morning, smoke was still rising from the port, where a towering grain silo was shattered. Toxic gases were been reported in the aftermath along with strange orange clouds, with the US Embassy warning any Americans in Beirut to stay inside.
Ammonium nitrate is mainly used as a fertilizer but has also been linked to terror attacks after being used in homemade bombs.
Meanwhile, Lebanese President, Michael Aoun has declared a state of emergency for Beirut for two weeks - and vowed the "harshest punishments" for those responsible for causing the explosion.