Mumbai-based Fauzia Ansari and her husband Nihal arrived in the holy city carrying several placards with the hope of getting back their son, who has already completed his jail term, from the neighbouring country.
Fauzia said she had written a letter to Aziz seeking an appointment to request for the release of her 32-year-old son.
She said as there was no reply from Aziz's office, she will now stand near the venue of the conference and display placards.
There was no whereabouts of him after November 10.
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The deputy attorney general of Pakistan had informed the court that Hamid was in the custody of Pakistani army and had been awarded three years' imprisonment.
Fauzia had filed a writ petition in the Peshawar High Court seeking release of her son after the completion of his jail term.
The petition was dismissed as the court had observed that army would decide on his release since he was in its custody.