Its a report by Reuters.Every source in the article is some unnamed person. Pure garbage by times of India.
India called off the talks not Pakistan. It is not the first time nor will it be the last, Pakistan speaking with Huriyat leaders. Like foreign office said, Huriyat leaders represent Kashmir and they are a stake holder, so is Pakistan, India calling Kashmir its internal matter does not make it so. Its still consider disputed by the world.
ToI makes that clear from 'source'.