I am planning a trip to Sweden and Norway. I did not find any trains on the interrailwebsite to cross the border. But on local websites there is a route with two trains and a bus connecting Bodo and Kiruna. Is the interrailpass valid on these trains? 

The first train from SJ NORD will take me from Bodo to Fauske station.

The second train from VY NATTAG will take me from Narvik to Kiruna.

Can I use the interrailpass or should i buy a separate ticket for these trains?