Brussels, January 19 - The European Commission will formally announce Wednesday the opening of a probe into State aid to the troubled ILVA steelmaker the Italian government is trying to clean up and revamp, sources aid Tuesday. The probe will cover the issue of the aid not being notified, among other things, the sources said. European Competition Commissioner Margrethe Vestager has informed EU authorities of the initiative, they said. According to the sources, however, the probe will only concern aid to production and not aid for the environmental clean-up at the highly polluting plant at Taranto. A government decree funnelled money into ILVA last year to save jobs while cleaning up the works, which have been linked to high cancer rates in the Puglia city.