"We will fight our case in court against Pak govt's illegal action," said Saeed.
Known for her outspoken nature and unrelenting pursuit for human rights, Asma, 66, was the first woman to serve as the President of Supreme Court Bar Association of Pakistan.
"We will emerge more strongly if you try to suppress us," said Saeed.
The UN team to visit Islamabad for an assessment of Pakistan's compliance with the world body's sanctions regime.
Hafiz Saeed has confirmed that his organisation Jammat-ud-Dawa would contest the 2018 general elections under the banner of the MML.
The founder of Lashkar-e-Tayiba also vowed to continue supporting Kashmiris.
The banned Jamaat-ud-Dawah head has hired Lahore-based law firm -- Mirza and Mirza Law Associates -- to file the petition.
Saeed's release has virtually 'boosted up the morale' of the six suspects facing the trial in Pakistan for the last eight years, believe Saeed's supporters.
'Saeed has been freed as the government decided not to detain him in any other case,' a top Pakistan official told PTI.
The board rejected the government's plea to extend his detention for another 3 months.
However, the board refused to allow the same in the detention of his four aides.
The JuD has been declared as a foreign terrorist organisation by the United States in June 2014.
Police and Lahore Development Authority officials were busy in removing encroachments outside the Arfa Karim Tower, located near the CM's Model Town residence, when a powerful blast took place.
The harrowing tragedy struck Pakistan's Punjab province on Sunday just a day before Eid celebrations when a tanker carrying 40,000 litres of petrol overturned and burst into flames as hundreds of villagers had gathered to collect the fuel spilled over on the highway at the Ahmedpur Sharqia area of the Bahawalpur district, some 400 km from Lahore.
The tanker exploded after fuel leaking from its damaged container caught fire.
Police produced Saeed and his four aides before the board at Lahore registry of the apex court.
Saeed's three-month detention period was to expire on Sunday night.
The government also told the court that it has reasons to believe that Jamaat-ud Dawah and its sister organisation Falah-e-Insaniat Foundation were engaged in activities which can be prejudicial to peace and security.
The Lahore High Court Bar Association said on Friday that it will take action against any lawyer who extends his services to Jadhav.
The custodian Abdul Waheed, who was apparently suffering from mental disease, used a dagger and a stick to kill his victims.