Sajid Ali Nizami told reporters that his father Syed Asif Nizami (80) went missing at Karachi airport while few others, including Nazim Nizami, who were travelling with him were detained at Lahore.
"Indian High Commission in Pakistan has taken up the matter of missing Indians".
"The personnel of an intelligence agency took the two Indian clerics into custody and shifted them to an undisclosed location", news agency PTI quoting the official sources in Pakistan said.
"I spoke to Mr Sartaj Aziz, Pakistan prime minister's adviser on foreign affairs, regarding the missing Indian nationals Syed Asif Ali Nizami and Nazim Ali Nizami of Hazrat Nizamuddin Aulia Dargah". Next day they went to see Data Darbar Dargah in Lahore. Later, Minister of State for External Affairs Ministry also reiterated that the government was putting in all efforts to ensure safe return of the two Indian Nationals.
The phones of both the clerics have since been switched off. Nazim Ali Nizami was stopped to clear some documentation at Lahore airport and Asif Nizami was asked to board the flight.
But reports of them flying back to India next week has buoyed their families.
According to government officials in India, exchange visits between clerics of New Delhi's Nizamuddin Dargah and the Sufi Daata Darbar shrine in Lahore take place regularly.
The Indian high commissioner in Islamabad had lodged a strong complaint with the foreign ministry in Islamabad on Thursday evening. However, there is no official confirmation reg their whereabouts.
The two clerics were set to fly to Karachi to visit the Islamic shrines but disappeared soon after.
The duo had entered Pakistan via Karachi on March 8. The MQM represents the Mohajir community, that comprises Urdu-speaking Muslims who migrated from India to Pakistan during the Partition in 1947.