A huge fire broke out Thursday at the port of Beirut, sparking fears among residents in the Lebanese capital a little more than a month after a massive blast in the area killed more than 190 people, according to reports.

Army officials said the fire started in the port’s duty-free zone at a warehouse with containers of tires, cooking oil and other flammable materials — sending a column of thick black smoke billowing skyward as flames leaped from the ground.

Port director Bassem al-Qaisi told Voice of Lebanon radio the fire started in the warehouse but spread nearby to where tires were piled.

“It is too early to now if it is the result of heat or some other mistake,” al-Qaissi said.

There were no early reports of any injuries.

TV footage showed firefighters trying to douse the flames at the port, where nearly 3,000 tons of ammonium nitrate detonated Aug. 4, setting off the massive explosion that sent shockwaves throughout the city.

About 6,500 people were injured in last month’s catastrophe, which destroyed and damaged thousands of buildings.

The stockpile of ammonium nitrate was stored for years at the port after being confiscated from an impounded Russian cargo ship.

On Thursday, panicked residents — still reeling from last month’s explosion — cracked open windows and called and texted each other to warn them of the latest incident to hit the city.

Some residents hid in bathrooms, while others dropped what they were doing and rushed home.

“We opened all windows and are in the corridor right now,” said Dana Awad, a mother of two girls who recalled the tremor that preceded the recent blast. “I am still feeling the earth shake. Living a flashback.”

With Post wires