"In view of the continuous detention of Syed Ali Geelani, the proposed public rally at Srinagar is postponed," Hurriyat Conference said in a statement here.
The Hurriyat said the authorities also denied permission for the rally and police has launched a crackdown on the leaders of the amalgam.
"Police has launched a hunt for Peer Saif Ullah and others and their houses are being raided and several party workers were arrested and lodged in police stations," it said.
"The party will announce new schedule for the public rallies in Srinagar and elsewhere. We appeal people to maintain peace and patience and avoid any attempts to march towards Srinagar," the statement said.
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Geelani was placed under "house arrest" to scuttle his scheduled public meeting in Tral township of south Kashmir on December 4.
The separatist leader was released on October 29, this year after 235 days of house arrest. He was put under house arrest in March after he returned from Delhi.