Widely known the sabotage of dosimetric groups during the big nuclear disasters. Usual pretext for the sabotage is "to avoid panic".
Typical is sabotage of soviet officials during the USSR; the heavier efforts are necessary to arrange all the documents, the more bribes can get the soviet veteran for each case when he or she serve his or her duties. The KGBsts ised to perform the ideological control on the minds of the population, instead of to reveal heavy violation of laws, that are dangerous for the state.
Usual is sabotage of the police officers in countries with high level of corruption.
2015.11.11. http://www.wsj.com/articles/ambiguity-shrouds-russian-plane-crash-investigation-1447255114 MARGARET COKER, TAMER EL-GHOBASHY and ANDY PASZTOR. Ambiguity Shrouds Russian Plane-Crash Investigation Most aircraft debris is still scattered in an Egyptian desert even though it may contain clues to the cause. Nov. 11, 2015 11:00 p.m. ET. SHARM EL SHEIKH, Egypt—The Egyptian-led probe into what caused the crash of a Russian passenger plane is bogged down in secrecy and squabbling, causing concern among safety experts that key evidence is being compromised. ..
2015.11.12 http://www.foxnews.com/world/2015/11/12/bomb-may-have-been-planted-near-russian-jet-fuel-line-counterterror-source-says/ Catherine Herridge. Intel on 'two-hour timer' uncovered in Russian jet crash investigation. November 12, 2015. ..Sabotage in the sky.. bomb was planted at or near the fuel line or where it attaches to the engine..