"The United States is getting deeper and deeper into the abyss of the Ukrainian crisis," Antonov was quoted as saying in a post on the embassy's Telegram messaging channel.
The United States says Wall Street Journal reporter Evan Gershkovich has been wrongfully detained and has called for his immediate release.
If found guilty, he can face up to 12 years in prison.
Russia has repeatedly said the West was behind the blasts affecting the Nord Stream 1 and 2 pipelines last September.
The FSB said that several thousand Apple phones had been infected, including phones of foreign diplomats from NATO members, Israel, Syria and China.
Reade made the decision to move to Russia after allegedly receiving warnings that her life and freedom were at risk in the US.
“As Americans, we condemn how our fellow citizen, Evan Gershkovich, has been unlawfully arrested and detained by Russian officials,” Rabbi Mendy Mirocznik said.