Thousands of Aam Aadmi Party supporters were joined by flag waving CPM cadres at the heart of Delhi today as protesters gathered to march to the Prime Minister's Office. CPM leader Sitaram Yechury is lending support to Chief Minister Arvind Kejriwal. The protesters, however, were stopped midway at Parliament Street by the Delhi Police, who also maintained that they did not seek permission for a march. The protest was soon called off. Mr Kejriwal, who has been camping out at Lieutenant Governor Anil Baijal's house for a week, in protest against what he calls a "strike" by Delhi's IAS officers, had repeatedly appealed to the Prime Minister to intervene and resolve the situation.