Yakir and the other seven commanders were executed in Moscow, virtually right after their trial at the dawn of 12 June 1937, without even reading their appeals. The man who performed their execution was Vasily Blokhin, the chief executioner of NKVD. The corpses were cremated on site, and the ashes were thrown into a mass grave dug at the Donskoye Cemetery. Members of the Yakir family were either immediately executed, like his younger brother, Moris Emmanuilovich (1902–1937), or sent to Gulag labor camps: Yakir's younger sister, Isabella Emmanuilovna (1900–1986) served there 10 years while his wife, Sarra Lazarevna (1900–1971) and his then-14-year-old son, Pyotr Ionovich (1923–1982), spent almost 20 years there. Yakir's military writings were banned. Plus, to morally finish the generals, newspapers dubbed them "treasonous", and published articles approving their execution, with the signatures of well-known Soviet artists – no matter if they in fact signed these articles or not (among those that refused was Boris Pasternak).