Loss in intransit for Import POs

Hi,

How to handle this scenarion in SAP..?

We have received the material against a Import PO in Port.The inco term is FOB.

We have inbound delivery process for Import POs.

While transfeering the material from Port to Our plant location theere is some intransit loss in qty.

Now...we need to pay for the complete qty ( Recd at port) to the import vendor .

The plant will do GRN only for the recd qty which will be less than the qty recd at port.

Where to act for this intransit loss qty is a question..

Rajesh satope