Owen Fay reports from Moscow that the Russian government is under heavy pressure to investigate war crimes documented in a videotape. The tape was obtained by a German television journalist and shown on Russian TV today. It shows Russian soldiers heaving bodies from the back of a tank into a crudely dug mass grave. Mutilated corpses are bound by barbed wire. Russian Foreign Minister Igor Ivanov says the military prosecutor's office is investigating the matter. He insists it would be premature to draw conclusions now.