Officials say one of the terrorists was killed while detonating explosives while the other was killed during a shootout with security forces in Hatay's Iskenderun district.
An FBI team is taking part in the investigation into the massive August 4 explosion at the invitation of Lebanese authorities.
Paris has handed the probe to investigating magistrates over the colossal blast that killed 171 people, injured thousands and displaced some 300,000 people.
UNICEF says three children among the dead in Beirut blast and at least 31 others hurt seriously. As many as 100,000 children were displaced from their homes, according to Save the Children, with many of them traumatised.
UN food agency “very, very concerned” that Lebanon could run out of bread in less than three weeks as 85 percent of the country’s grain comes through Beirut’s devastated port
Documents show Lebanese security officials warned the prime minister and president in July that 2,750 tonnes of ammonium nitrate stored in Beirut's port posed a security risk and could destroy the capital if it exploded.
Lebanese protesters have stormed government ministries in Beirut and trashed the offices of the Association of Lebanese Banks, TV footage showed, as shots were fired in growing protests over this week's devastating explosion.
The blast centred on the city's port caused massive destruction and killed at least 135 people, heaping misery on a country in crisis.
Lebanese Red Cross says at least 100 people have been killed and over 4,000 wounded in the massive explosion at a port in Beirut.
At least three gendarmerie personnel were killed in the blast that occurred as explosives and fireworks from a previous blast site were being transferred for disposal.
Police were unable to say if the blast in the city of Blankenburg was deliberately set off or if it was an accident.
A gas tanker exploded at a ceramics factory in Khartoum on Tuesday, killing at least 23 people and injuring 45 more.
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