Kremlin spokesman Dmitry Peskov questioned the tone of a letter sent by U.S. President Donald Trump to his Turkish counterpart Recep Tayyip Erdogan, which it called highly unusual for correspondence between heads of state.
"You don’t often encounter such language in correspondence between heads of state. It’s a highly unusual letter," Reuters cited the spokesman as saying.
The White House released the Oct. 9 letter, in which Trump urged Erdogan: "Don’t be a tough guy" and "Don’t be a fool!"