"No headway has been made in the investigation of (the) Pathankot attack so far. The ball is back in India's court again as we need more evidence to move forward in the probe," the source told PTI.
The six-member Pakistan government's team investigating the Pathankot airbase attack has written to the foreign ministry to seek more "leads" from India.
"The team needs more evidence. We have written to the government to speak to India and apprise it of the situation and demand more evidence to move forward in the investigation here," he said.
India had given "specific and actionable information" to Pakistan soon after the January 2 attack.
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Prime Minister Sharif had formed the six-member investigation team headed by Additional Inspector General of Punjab's Counter-Terrorism Department (CTD) Rai Tahir in the second week of January to probe the Indian government's assertion that JeM was behind the Pathankot attack. The team has so far held two meetings.
Sharif told reporters here on Saturday that "the investigation into the Pathankot incident is underway and we will make its findings public soon."
"Whatever facts come out, we will bring them forth before everyone," he had said.
The government has not disclosed the number of suspects detained. However, reports said 31 JeM suspects have been taken into custody.
Punjab Law Minister Rana Sanaullah had said last month that Azhar had been taken into "protective custody" along with some of his "accomplices".