Sibir said in a regulatory statement that 'various Chigirinsky interests' were further in debt to the company than the $115 million it had previously announced.
'The board of Sibir will now assess the effect of this increase in the indebtedness on Sibir's ability to recover the indebtedness and the consequent impact on Sibir's financial position,' the company said in the statement.
Sibir, which owns oilfields in western Siberia and a 240,000-barrel-per-day refinery in Moscow, had planned to recoup the $115 million by scrapping controversial deals to buy real estate from Chigirinsky.