A store of oil and tyres at Beirut port caught fire on Thursday, a military source said, a little more than a month after a massive blast devastated the port.
The fire erupted in the duty free zone of the port, sending a huge column of smoke above the city.
The military source said the cause of the blaze was not immediately clear.
Television footage showed firefighters trying to douse the blaze at the port, where warehouses were shattered by the August 4 blast.
About 190 people were killed in last month's explosion and a swathe of Beirut near the port was ruined. The blast was caused by a huge store of ammonium nitrate that had been kept at the port in poor condition for years.
Russian strikes on Ukraine kill four, knock out heat and power
BBC seeks to have Trump's $10 billion lawsuit dismissed
Venezuela says 116 prisoners released, rights groups cite much lower figures
Australian teen charged with making hoax mass shooting calls in the US
