Kharge complained to Speaker Sumitra Mahajan during the Zero Hour that part of what he had said in the House on December 2 on issue related to Singh has not become part of the records despite the fact that she had not expunged any of his statements on that day.
The Speaker told him that he could not raise an issue without giving any prior notice as she was herself unaware of the matter.
Kharge referred to certain rules to which Mahajan said, "There are no rules in the Zero Hour. I don't even know the subject. You give notice and I will look into it."
The Congress leader said it was "gross injustice". Some other opposition leaders, including P Karunakaran (CPI-M), urged the Speaker to let Kharge speak.
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The opposition party has been trying to corner the government over controversial 'dog' remarks of Singh, Minister of State for External Affairs, after two Dalit children were burnt alive in Haryana.
Leader of the Opposition in Rajya Sabha Ghulam Nabi Azad, Leader of Congress in Lok Sabha Mallikarjun Kharge, party leaders Anand Sharma, Deepender Hooda and several others participated in the protest held shortly before the Lok Sabha and Rajya Sabha assembled for the day.
In the wake of the killing of the Dalit children in Faridabad in October, Singh had kicked up a storm with his comments that the Centre cannot be blamed if somebody throws a stone at a dog.