A part of the middle grain silos in the port of Beirut which collapsed following the damage caused by the August 4, 2020 massive explosion that hit the Lebanese harbour.
Tarek Bitar is the second magistrate to take on the sensitive case, which has pitted him against the powerful Hezbollah movement and its allies.
Here are some key facts about the blast and its aftermath.
On August 4, 2020, one of history's biggest non-nuclear explosions destroyed most of Beirut port and the surrounding areas, killing more than 200 people and injuring over 6,500 others.
The blast was caused by a fire in a warehouse where a vast stockpile of the industrial chemical ammonium nitrate had been haphazardly stored for years, authorities said.
French President Emmanuel Macron, during a visit to the Lebanese capital two days after the blast, called for an international probe, which then-president Michel Aoun rejected.
Other moves since then for an international investigation have also been rejected by Beirut.
The tragedy struck Lebanon as it was battling what the World Bank later called one of the world's worst financial crises in 150 years, fanning demonstrations against the government.
Under pressure from protesters, on August 10 Hassan Diab stepped down as Lebanon's prime minister.
Relatives of the victims have been holding monthly vigils for more than two years, seeking justice and accountability.
A domestic probe into the cause of the explosion was launched, but has failed to hold officials accountable.
In December 2020, the first lead investigator, Fadi Sadaw, charged Diab and three former ministers with negligence.
But Sadaw was removed from the case two months later over accusations of breaching the constitution.
The victims' families have placed their hopes in his replacement, young and motivated judge Tarek Bitar, who soon found himself up against the Shiite Muslim movement Hezbollah and its ally Amal.
Bitar had been repeatedly forced to suspend the probe in the face of legal challenges.
His attempt in late 2021 to have ex-finance minister Ali Hassan Khalil of Amal arrested triggered deadly clashes in Beirut.
On Monday, a judicial source told AFP Bitar had resumed his investigation after a 13-month halt.
Reopening the case, Bitar charged eight suspects, including General Security head Abbas Ibrahim and State Security agency chief Tony Saliba, and released five others.
The port blast and stymied probe compounded the disaffection with Lebanon's political elite that had sparked a popular revolt in October 2019.
Hezbollah and its allies lost their outright majority in May 2022 parliamentary elections, but their opponents also failed to take power.
Prime Minister Najib Mikati's government has remained in place in a caretaker capacity with limited powers, unable to enact the sweeping reforms demanded by international lenders to release a multi-billion-dollar bailout.
Aoun's mandate as president expired in October 2022, worsening the political crisis.
Lawmakers have failed elect a successor 11 times, leaving the country effectively rudderless.