Avianca Boeing Dreamliner took a sharp turn when flying over west Venezuela
TCAS maneuver sounds more and more likely.
not quite.
Nav/FMS error or as indicated on first post a loss of SSR data more likely.
Anyway, any State can intercept any aircrfat flying over his territory for whatever reason. Bruised feathers because of the 2 countries relations , but from a pure Civil aviation point of view , a non issue., unless there was a risk of collision of course.