“The U.S. knows for certain that the fragments formed during the tests did not and will not pose a threat to orbital stations, spacecraft and space activities,” the Defense Ministry said, according to RIA Novosti
"Researchers found that the US has the largest amount of 'space junks' at 4,037 items, closely followed by Russia and its commonwealth allies with 4,035 pieces orbiting."
The Russians are demonstrating they have capability ready to take on the US, who have already themselves declared the beginning of "Space Wars" ( AKA the newly formed US "Space Force"), in orbit by removing satellites.
They most certainly had calculated that the resulting crap would not be in the Space Station Orbit as they have people up there too. So... it probably wasn't, but who knows? blowing shit up in orbit is somewhat unpredictable.