The 132 meter long, 4640 dwt tanker Volgoneft 121 went aground on Nizhnyaya Sheksna River  near the 545 kilometer mark.  The Vologneft 121 was attempting to drop anchor in the fog when it struck bottom.   The tanker suffered damage to its hull with its ballast tanks breached suffering water ingress.  No reports of injuires or pollution released.   The Volgoneft was en route to St. Petersburg, Russia from Yaroslavl with 4267 tons of gasoline.