A planned motorway linking Warsaw and Helsinki is the focus of a growing row between Brussels and Poland. The European Commission wants to halt work on the new road in northeastern Poland, which will cross a nature reserve, seen by Brussels as of special environmental interest. The Commission has launched legal action hoping to force Poland to find a new route. Warsaw has stopped work until Wednesday, but says it may re-start. The Commission spokesman Barbara Hellferich said it is an unprecedented situation that a member state might defy Brussels.