Indian authorities have detained hundreds of separatist leaders and Muslim activists in an escalating crackdown in disputed Kashmir with the region remaining on high alert following a suicide bomb attack. Police said about 400 arrests had been made over the weekend in late-night raids aimed at weakening support for groups resisting Indian rule in the Himalayan territory also claimed in full by Pakistan. The sweeps follow the February 14 attack on an Indian convoy in Pulwama district which killed 40 soldiers and was claimed by Pakistan-based Islamist group Jaish-e-Mohammed (JeM).