Overseas Shipholding Group says it is owed seven figures from the bankrupt company behind the exploded Philadelphia oil refinery.

In reporting its second quarter earnings, the Jones Act tanker owner disclosed that it had approximately $4.3m in outstanding receivables from Philadelphia Energy Solutions.

The refinery owner declared Chapter 11 bankruptcy 22 July after an explosion rocked the financially troubled plant, the biggest on the US east coast, 21 June.