A Sri Lankan high court convicted 14 men on all charges Tuesday in connection with the 2019 Easter Sunday bombings that killed 279 people and injured hundreds more across churches and hotels.

The three-judge panel at the Colombo Permanent High Court Trial-at-Bar delivered the verdict after a nearly five-year trial. A 15th defendant was convicted on some charges, while nine others were acquitted due to insufficient evidence. One of the original 25 accused died in custody.

The coordinated suicide bombings on April 21, 2019, struck three churches and three luxury hotels in Colombo, Negombo, and Batticaloa. The deadliest attack hit St. Sebastian’s Church in Negombo, where more than 100 died. The perpetrators, members of the local Islamist group National Thowheeth Jamath linked to ISIS, all died in the blasts. Forty-five foreigners were among the victims.

Prosecutors charged the defendants with murder, conspiracy to commit terrorism, and weapons offenses under the Prevention of Terrorism Act. The men faced more than 23,000 counts in total. Among those convicted was Mohamed Naufar, also known as Naufer Moulavi, identified by authorities as a key organizer.

The court imposed sentences ranging from 200 to 260 years in prison, ensuring the convicted men will remain incarcerated for life. Sentencing occurred late Tuesday evening following the verdict.

The attacks occurred years after Sri Lanka’s civil war ended and highlighted intelligence failures. A parliamentary inquiry previously found that officials had received warnings but did not act. The trial included testimony from over 2,300 witnesses and thousands of pieces of evidence.

Dozens of police provided security outside the courthouse during the proceedings. The convicted men, all from Sri Lanka’s Muslim minority, had denied the charges throughout the case.