SRINAGAR, India (AP) — India has banned the largest political and religious group in Indian-controlled Kashmir in an ongoing crackdown on activists seeking the end of Indian rule in the disputed region, amid the most serious confrontation between India and Pakistan in two decades.

Authorities imposed a security lockdown in several parts of the region on Friday, including in downtown areas of the main city of Srinagar, in anticipation of protests against Indian rule.

India's home ministry issued the ban on Jama'at-e-Islami on Thursday night, accusing the group of being an "unlawful association" and supporting militancy in the region.

Police have arrested at least 400 activists and leaders, mainly from Jama'at-e-Islami, which seeks self-determination for the entire Himalayan region, which is divided between India and Pakistan but claimed by both in its entirety.