The Daily Mail says Long will be furious with his club West Brom after they pulled his £5million deal to join Hull City just 10 minutes before the window was due to shut.
Long left the Irish training camp near Dublin this afternoon and flew to Leeds-Bradford airport where he was met by Steve Bruce.
The former Reading striker had a medical at a clinic in Leeds and was then driven over to Hull's training ground by Bruce to complete the formalities of the deal.
Having agreed terms, the pair were about to sign a new club record deal for Hull City when West Brom pulled the plug just after 10.45pm.
When those moved collapsed, the call was made to Long to return to the Midlands after the international week.
For the big stories and the banter follow us on Twitter: @tribalfootball