KARACHI - If Taliban are sincere with peace, they should release the people they have detained, Aseefa Bhutto Zardari said in a tweet.   In her remarks at the social media website over the government’s peace talks with the TTP, Aseefa, a daughter of Asif Zardari, said that the Taliban are holding Shahbaz Taseer (son of assassinated Punjab Governor Salman Taseer) and Haider Gillani (son of former PM Yousuf Raza Gillani) for long time in their detention. “The release of abducted prisoners could prove sincerity of Taliban,” she remarked.