Pakistani officials say the leader of an outlawed militant group has been taken into "protective custody" for a probe as to whether he is linked to a deadly attack earlier this month on an Indian air base.

Seven Indian soldiers and all six attackers were killed in the assault in Pathankot, close to India's border with Pakistan.

Security officials said on Friday that Maulana Masood Azhar, the head of outlawed Jaish-e-Mohammad militant group, was put under custody this week. The officials didn't elaborate and spoke on condition of anonymity because they aren't authorized to speak to reporters.

The development comes a day after India postponed peace talks with Pakistan, saying it is evaluating actions taken by Islamabad against Pakistan-based insurgents it blames for an attack on the Indian air base.