The trial of 25 men accused of masterminding the 2019 Easter bombings in Sri Lanka has begun.

The bombings, which targeted three hotels and three churches. killed 267 people and injured about 500 on Easter Sunday on April 21, 2019.

More than 23,000 charges have been filed against the suspects, and 1,215 witnesses have been called to testify, BBC reported.

However, the suspect’s lawyers have questioned the plausibility of having this number of charges and witnesses, calling the trial “a futile exercise.”

Some of the charges that the suspects have been charged with include conspiring to murder, aiding and abetting the attacks, and collecting arms and ammunition.

All eight of the suicide bombers who carried out the Easter Sunday attacks died in the blasts.

However, their associates and relatives stand accused of being involved in planning and masterminding the terrorist attacks, which are some of the most bloody in Sri Lanka’s turbulent history.

They include the father of two of the suicide bombers, and another Sri Lankan national suspected of being affiliated with the Islamic State.