BEIRUT — More than four tons of ammonium nitrate near Beirut's port was discovered on Thursday by the Lebanese military, evoking a chilling reminder of the horrific explosion a month ago that killed 191 people.

Nearly 4.35 tons of the dangerous chemical stored in four containers was found near the port by army experts were called in for an inspection. There were no details on the origin of the chemicals or their owner, the Lebanese military said in a statement.

The find comes almost exactly a month after nearly 3,000 tons of ammonium nitrate stored at Beirut’s port for six years detonated, killing at least 191 people killed and injuring more than 6,000 people. The blast left nearly 300,000 people homeless and caused damage worth billions of dollars.

According to reports citing the statement, customs officials had called in the army to inspect containers at a facility near the port, where they found 4.35 tons of ammonium nitrate. It said army experts were “dealing with the material," an apparent reference that it was being destroyed.

Days after the Aug. 4 blast, French and Italian chemical experts working amid the remains of the port identified more than 20 containers carrying dangerous chemicals. The army later said that these containers were moved and stored safely in locations away from the port.

French experts as well as the FBI have taken part in the investigation into the Aug. 4 blast, at the request of Lebanese authorities. Their findings have yet to be released.

So far, authorities have detained 25 people over last month's explosion, most of them are port and customs officials. — Agencies