Russian automaker OAO GAZ said it was unable to confirm brash claims yesterday by OAO Siberian Aluminium (Sibal) that the metals group held a critical stake of 25% plus one share in the car and light-truck producer. GAZ, whose foreign partners include European Bank for Reconstruction and Development (EBRD) and Fiat Auto SpA, has faced mysterious takeover threats for months, rumoured throughout to have come from Sibal. The metals group had denied any interest in the automaker categorically and repeatedly - even days ago. But Sibal said it now aims to take "absolute control" of GAZ, Bloomberg reported yesterday.