Physical bunker suppliers stung by the collapse of OW Bunker are continuing to challenge rulings by US judges that have denied them a lien to arrest vessels.

NuStar Energy Services and US Oil Trading have each filed new appeals, adding to the growing number of OW battles that are now taking place in the US Circuit Courts of Appeal.

They come as maritime lawyers are already anxiously waiting for decisions by several appellate panels already tackling the first round of OW appeals.