Bangladesh's longest-serving prime minister Sheikh Hasina Wazed began her political career as a pro-democracy icon, but in recent years that has taken a dramatic turn.

Since August last year, Hasina has been in exile in India, where she fled after being deposed by a student-led uprising which spiralled into nationwide unrest.

On Monday, a tribunal in Bangladesh will deliver a widely anticipated verdict on whether she committed alleged crimes against humanity by ordering a deadly crackdown on the student protesters. She denies the charges.

Prosecutors have demanded that Hasina be put to death if found guilty.

Up to 1,400 people were killed during the weeks of protests leading up to her ousting, UN human rights investigators have said.