The European Commission said on Wednesday it launched an investigation into suspected dumping of solar panels by Chinese producers, a move that could trigger a trade war between the European Union and China.

The investigation into one of the biggest import sectors ever targeted stems from a complaint by a group of European solar companies, led by Germany's SolarWorld .

The group, comprising members in Germany, Italy, Spain and other EU countries, says Chinese peers have been selling panels below market value in Europe.

China's solar firms have warned of a trade war, calling on the Beijing government to strike back. Chinese producers include Yingli Green Energy , Suntech Power Holdings Co Ltd , Trina Solar Ltd and Canadian Solar Inc .

(Reporting by Philip Blenkinsop In Brussels; Editing by Maju Samuel)