Sindh National Front (SNF) chief Mumtaz Bhutto has no right to file a first information report regarding Benazir Bhutto's assassination as he had always criticised her during her life, Benazir's younger sister Sanam Bhutto said on Wednesday. According to a private TV channel, Sanam said Mumtaz wanted to gain public sympathies in the name of Benazir, "but, he did not lend any help to Benazir during her five years in exile and did not do anything about her assassination". The channel said Sanam denounced Mumtaz as the chief of the Bhutto clan and also denied having differences with President Asif Ali Zardari. "The reports being published in the media in this regard have no substance," Sanam said. She said as Benazir had tended to her during her life, it was her (Sanam's) responsibility to take care of her children. Sanam said she had returned to Larkana to look after her property and meet the locals.