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.
The United States has denounced the prospective deployment of nuclear weapons in Belarus but says its stance on the use of such weapons has not been altered.
"It is difficult to imagine a greater shame for a country than having such senators," Kremlin spokesman Dmitry Peskov was quoted as saying by the Shot Telegram channel.
The clashes led Serbian President Aleksandar Vucic on Friday to place the army on full combat alert and ordered units to move closer to the border.
The United States has said the world faces the gravest nuclear danger since the 1962 Cuban Missile Crisis because of remarks by President Vladimir Putin during the Ukraine conflict.
Russia, which has more nuclear weapons than any other state, has repeatedly said the West is engaged in a proxy war with Russia over Ukraine that could escalate into a much bigger conflict.