Description : Hundreds of thousands of devotees continued to congregate for Biswa Ijtema, as the world's second largest Muslim's gathering began today. Muslims have participated in Zummah prayer (noon prayer) at the congregation field. Pilgrims continued to stream onto the sandy banks of the Turag River to join prayers amid tight security. A 15,000-strong security force was in place. Organisers expect about more than three millions to join the mass prayers on Sunday, the final day of the congregation. The gathering shuns politics and focuses on reviving the tenets of Islam and promoting peace and harmony. Several thousand foreign participants are expected by Sunday according to Tabligh Jamaat, the organisation of Islamic preachers, that sponsors the event. Dhaka, Bangladesh.