The KGB agent was sucked into the vortex at the end of the film.
Sorry if I'm a little late to the party but one of the KGB agents in the motorcycle chase was one of the few remaining soviet soldiers at the end of the film. After he and his partner eluded the police they reported back to Spalko and suited up for south america. They survived the jungle chase, the ants and were one of the few soldiers left after the tree flung back and crushed some soviet soldiers at the cliff. He is seen during the cliff scene where the soviets are climbing down the cliff, He looks at spalko as soon as the tree crushes the soviets. And he turns around so the camera can see his face in the temple. He is one of the four soldiers who are sucked into the vortex/portal. Wow thats to much detail for me to cover one side character.