Delhi Chief Minister Arvind Kejriwal on Wednesday termed the incident of burning of two Dalit children to death in Haryana as "shameful" for the nation."Burning of two kids alive is shameful for the whole country," he tweeted. "What is happening to India? Violence and hatred everywhere."Meanwhile, the Aam Aadmi Party on Wednesday demanded a fair and time-bound probe into the arson attack by upper castes in Faridabad on Tuesday that left the two children dead and their mother battling for life.AAP leaders Sanjay Singh and Ashutosh visited the bereaved family in a Faridabad village near Delhi."This is not the first time that such an incident has happened in the state. We demand a free and fair investigation into this matter in a time-bound manner," Ashutosh told IANS."The matter should also be tried in a fast track court so that justice is delivered in six months," he said.