One of the largest gathering of Muslims, Bishwa Ijtema, is under way in Bangladesh.

Millions from around the world congregate for prayer and religious discussions just north of the capital Dakha.

For retailers in the area, the gathering also means big business.

Bishwa ljtema is only second to the Hajj to Mecca in the number of people it attracts.

Al Jazeera’s Maher Sattar reports from Tongi.