Senior lawyer Adeel Raja said Asma suffered heart attack today morning.
Pakistani Nobel Peace Prize victor Malala Yousafzai said on Twitter she was "heartbroken" at the death of the "savior of democracy and human rights", especially as the pair had just met in Britain a week ago.
Prime Minister Shahid Khaqan Abbasi expressed grief at Asma Jahangir's death, praising her contribution to upholding the rule of law and safeguarding human rights. It is an irreparable loss. "May her soul rest in peace", he added. "Ameen", Maryam Nawaz, daughter of Nawaz Sharif tweeted.
"I remember meeting her along with party colleagues H S Dhami and Dr Manjinder Singh at Circut House Amritsar on 3rd March 2008 to present memorandum to her on Sikh issues". Zaid Hamid, a controversial political commentator known to have a liking for conspiracy theories, compared her to a Pakistani politician who is accused of treachery and inciting violence.
Nobel prize victor Malala Yousafzai remarked: "Heartbroken that we lost Asma Jahangir - a saviour of democracy and human rights".
Punjab state chief Shehbaz Sharif tweeted that he was "deeply saddened" at the news. We say goodbye to a great great artist and a fearless activist.
Born in 1952, Jahangir was renowned for defending the rights of persecuted minorities in Pakistan. She has also been Supreme Court Bar Association president. She done her bachelors from Kinnaird College and LLB from the Punjab University (PU).
She was among the rare personalities participated in the Movement for the Restoration of Democracy (MRD) during Ziaul Haq's dictatorial regime and sent to Jail for her activism in 1983.
In 1986, she moved to Geneva and became the vice-chair of the Defence for Children International. She was hailed as a courageous crusader, awarded dozens of worldwide honors, nominated for a Nobel Peace Prize and described as "the gutsiest woman" in Pakistan.
Nobel Peace Prize victor Malala Yousafzai described her as a "savior of democracy and human rights".
Asma also played an active role in the famous Lawyers' Movement to restore Iftikhar Chaudhry as the chief justice of Pakistan.
In her lifetime, she was awarded with prestigious awards in the country including the Hilal-i-Imtiaz and Sitara-i-Imtiaz in recognition of her services.
An outspoken critic of the country's powerful military establishment, Asma, 66, passed away in Lahore due to cardiac arrest.