NNA did not name the individuals, but quoted Judge Fadi Akiki, a government representative at the military court, as saying authorities had so far questioned more than 18 port and customs officials and others involved in maintenance work at the warehouse.

"Sixteen people have been taken into custody as part of the investigation," NNA quoted Akiki as saying. He said the investigation was continuing.

A judicial source and two local broadcasters said Beirut Port General Manager Hassan Koraytem was among those held. Earlier, the central bank said it froze the accounts of seven people including Koraytem and the head of Lebanese customs.