SRINAGAR (Agencies) - An undeclared curfew was imposed in Srinagar as Indian police and paramilitary forces locked down the summer capital of Kashmir Wednesday to prevent anti-election demonstrations after protests flared overnight. Troops patrolled the deserted streets of Srinagar, the urban hub of a nearly two-decade-old revolt against New Delhis rule of the Muslim-majority state. Weve imposed restrictions on civilian movement to maintain law and order, police officer Pervez Ahmed said as policemen raised barricades and stopped residents leaving their homes. Freedom movement leaders oppose elections in Kashmir, arguing that the polls legitimise Delhis rule of the disputed territory. The clampdown came after 20 people were hurt in anti-election protests in Srinagar, as the region prepares for further voting on Thursday in the third of five nationwide general election phases. Security was tightened in southern Anantnag segment that goes to polls on Thursday, with Srinagar city itself voting on May 7. Police placed Kashmiri leaders under house arrest, including hardliner Syed Ali Geelani and moderates Mirwaiz Umar Farooq and Yasin Malik. Geelani has called for a two-day strike on Wednesday and Thursday to protest against the elections. New Delhi is frustrated by our resistance movement, and not allowing us to carry out peaceful protests against the polls is a shameful act, said Mirwaiz Umar Farooq. The strike closed down shops, schools and businesses in major towns of Kashmir, police and residents said.