NATO spokeswoman Carmen Romero said the alliance had received notification through military channels that Russia's Defense Ministry had taken a decision "to halt international military cooperation events between Russia and NATO countries until further instructions."
She said NATO "takes note" of the decision, but had no further reaction.
On Tuesday, NATO foreign ministers said they would make further ties with Russia dependent on Moscow making good on a pledge to pull its troops back to pre-conflict positions in Georgia. However, they stopped short of calling an immediate halt to all cooperation.
Under a 2002 agreement that set up the NATO-Russia Council, the former Cold War foes began several cooperation projects. They include sharing expertise to combat heroin trafficking out of Afghanistan, developing battlefield anti-missile technology, joint exercises and help with rescue at sea.
Romero said she was unaware of any specific events under the cooperation agreement scheduled before early September.
NATO itself decided last week to suspend plans for a Russian warship to join NATO counterterrorism patrols in the Mediterranean Sea, deciding it was inappropriate in the wake of the eruption of fighting in Georgia.