Muslim devotees of home and abroad have started gathering on the bank of the Turag river in Tongi to attend the first phase of Biswa Ijtema set to start today.
The first phase of the Ijtema, the largest Islamic congregation after Hajj, will end on January 12. The second phase will be held from January 17 to 19.
Both the phases will end with separate Akheri Monajats (concluding prayers) on the last days.
Tabligh Jamaat leaders Maulana Zubair and Maulana Saad Kandhalvi with their followers will take part in the phases.
To accommodate thousands of devotees, numerous tinned-roof houses were built in the area, while several small bridges and culverts were also constructed for swift commuting in the area.
The Ijtema media affairs Coordinator Mufti Zahir Ibn Muslim said they prepared rooms for around 10,000 foreign guests on the north-western side of the Ijtema ground.
SM Tariqul Islam, deputy commissioner of Gazipur, said the government would provide uninterrupted electricity and water supply to the area during the congregation.
Law enforcing agencies have also taken different security measures to ensure the safety to the people gathered in the area.
Tablig Jamaat has been organising Biswa Ijtema every year since 1946.