India Post — Items stuck at KOL AP TMO

I am expecting some important documents sent to me by my university(RWTH Aachen University). The items were received at Delhi International Mail Centre on 21/05/2021 from Germany(Deutsche Post AG). Later it was received at KOL AP TMO on 27/05/2021.
The tracking numbers are as follows -
RH[protected]DE
RH[protected]DE

Both the items are sitting at KOL AP TMO for about two weeks now. What is causing the delay?