Authorities have imposed a curfew and shut down the internet in parts of the troubled north-eastern Indian state of Manipur after protests erupted over the arrest of leaders from an ethnic group.

On Sunday, police arrested five leaders of Arambai Tenggol, an armed Meitei radical group, including their chief Asem Kanan Singh.

India’s top investigation agency said Singh was arrested at Manipur’s Imphal airport for his involvement in “various criminal activities” related to the violence that broke out in the state in 2023.

Manipur has been rocked by periodic violence since 2023 after ethnic clashes between the two largest groups, the majority Meitei and minority Kuki, over land and influence.