The Aam Aadmi Party (AAP) leaders and workers will today observe a 'samuhik upwas' or mass fasting to protest against the arrest of Delhi Chief Minister in a corruption case linked to the Delhi liquor policy. AAP leader Gopal Rai said that Arvind Kejriwal's supporters across India and abroad will also participate in party's 'samuhik upwaas'. "People can observe the fast at their homes and support the Delhi Chief Minister," he said.