There were a couple in Europe some years ago.
One was a Lear Jet -departed Zurich and went R/F. When intercepted nobody was visible in the cockpit. It eventually crashed near Iceland.
A Mig (?) took off from somewhere in DDR, the pilot ejected for some reason and the a/c, escorted by F16s from Soesteberg, continued over W. Germany, Netherlands and Belgium before finally crashing near the French border, killing one on the ground