According to Defense News, Hecker told reporters about this.
It is noted that after the warnings of the United States in the regions of Ukraine, alarms were heard.
He also said that later the United States "were able to provide better data" to Kyiv.
Including Hecker said that the United States passed intelligence information to Kyiv about the whereabouts of Russian military equipment.
Earlier, Russian Foreign Ministry spokeswoman Maria Zakharova said that the United States had actually become a party to the conflict in Ukraine.