"The port still contains explosive material on its territory. We have forwarded a letter to the competent authorities and asked the customs service to get them out," Al Kaissi said, as quoted by Lebanon’s El Nashra news portal.
The director also claimed that he intends to file a lawsuit on Monday against the owners of these substances, whose identities are still to be established.
On 4 August, a massive explosion occurred at the port of Beirut that destroyed nearly half of the city’s buildings.
The Lebanese government declared a state of emergency in the capital and resigned less than a week after the Beirut blast, following public anger that caused thousands of protesters to take to the streets, calling for Prime Minister Hassan Diab to step down.