Saeed, the Jamaat-ud-Dawa (JuD) chief, has been under house arrest since January 31 this year.
The Punjab Home Department yesterday issued an order extending the house arrest of Saeed and his four aides Abdullah Ubaid, Malik Zafar Iqbal, Abdul Rehman Abid and Qazi Kashif Hussain - for another 30 days with effect from September 25. The previous order to extend his house arrest was issued on July 28.
On January 31, Saeed and four others were put under house arrest by the Punjab government for 90 days under the Anti-Terrorism Act 1997.
In its latest order, the Punjab Home Department said, "Jamaat-ud-Dawah and Falah-e-Insaniat have planned to spread chaos in the country on their expected release. They have planned to make demonstrations under the leadership of Saeed. He will be portrayed as hero and his acts will be glorified."
The notification said that Abdul Rehman Makki, who is the central leader of the JuD, had been making preparations for his release.
"Transport is being arranged, arms are also being collected for show of force and for use, if need to be, against the personnel of law enforcement agencies. Funds are also being used collected for the purpose. The liberty of Saeed is a continuous threat to the peace and tranquility. Further recommendation for his detention is in the interest of peace and order."
The notification further said that the District Intelligence Committee Lahore separately said: "There is apprehension that Saeed shall create law and order situation upon release."
Additional Home Secretary Mar R Azam Suleman said that the activities of Saeed were "prejudicial to public safety and maintenance of public order".
Justice Syed Mazahar Ali Akbar Naqvi turned down a request by the Home Department for holding in-camera proceedings of the petition as the matter was sensitive. The judge adjourned hearing till October 2.
JuD leaders' counsel Advocate A K Dogar had contended the government detained the petitioners on the basis of mere apprehension.
He said imprisonment without trial and conviction was prima facie unlawful and unconstitutional.
An official of the Home Department presented the latest detention order of the petitioner before the court. He told the court that activities of JuD leaders, if released, would pose a serious threat to the public safety and cause breach of public order.
JuD is believed to be the front for the banned Lashkare-Taiba (LeT) which is responsible for carrying out the 2008 Mumbai attack.
The US has offered a USD 10 million bounty for Saaed for his alleged role in the Mumbai attacks.