MOSCOW. Aug 26 (Interfax-AVN) - Authorities have not yet ruled out any possible causes for the simultaneous crashes of two passenger aircraft on Tuesday, including sabotage, terrorism, technical failures or human error, Prosecutor General Vladimir Ustinov told a conference chaired by President Vladimir Putting in the Kremlin on Wednesday.
Two investigating teams headed by his deputies have been set up, he said.
The analysis of flight recorder evidence may have started, Ustinov said.