According to the newspaper, leaders of the All Parties Hurriyat Conference, Syed Ali Shah Geelani and Mirwaiz Umar Farooq, received invitations to the High Commission on Tuesday evening.
In 2014, Pakistan invited separatist leaders before talks between the foreign secretaries of India and Pakistan, but India canceled the meeting, saying separatist involvement would be an "unacceptable interference" to the talks.
The upcoming talks are expected to take place despite Pakistan's decision to invite Kashmiri separatists for Aziz's "reception party," the media outlet reported.
India and Pakistan have disputed the region of Jammu and Kashmir since the end of British rule in 1947. The countries agreed to a ceasefire in 2003 following a number of military conflicts.
India and Pakistan have not been able to agree on an official boundary in Kashmir. The countries are divided by a Line of Control. Exchanges of deadly weapon fire occur regularly, resulting in both sides accusing each other of violating the ceasefire agreement.