A reward of up to $1m (€770,000) was offered for information leading to the recovery of diamond rings, necklaces and watches stolen in an €8m robbery in Paris.

French financial investigators are searching for a London-based broker believed to be tied in with rogue trader Jerome Kerviel’s massive fraud.

Accused French rogue trader Jerome Kerviel told police his Societe Generale bosses must have been aware of his massive risk-taking on markets but turned a blind eye as long as he earned money, a judicial official said tonight.