Rusal chairman could now sue

RUSSIAN billionaire Viktor Vekselberg is considering suing Rusal over accusations that he failed to fulfil his duties as its chairman, intensifying a battle with rival oligarch Oleg Deripaska at the world’s largest aluminium producer.

The two billionaires have been fighting over Deripaska’s ambition of merging the firm with Norilsk Nickel.

Vekselberg quit as chairman on Tuesday, criticising the management of the heavily indebted company and saying it was in “deep crisis”.