India refuse to issue visa to Atif Aslam and Ustad Hamid Ali khan

From the rival sources it is heard that india refuse to issue visa to the well known Pakistani singer Ustad Hamid ali khan sahab and Atif aslam. On the other hand they are serverls talks about Aman ki asha but what's the reason behind they refuse to issue visa to Pakistani singers thought both the singers were invited by Indian musical program organizer? For details have a look at pictures below.

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