Raikkonen was forced to retire early from the race, with Kvyat able to finish and record a P15 finish for the Red Bull sister side in Singapore.
"I was surprised because I made a move, I made it clear," Kvyat said to reporters after the race. "He moved under braking, a thing we discuss a lot. He was the one against it, actually. I'm surprised he did it.
"If you defend, then you defend. If you leave the door open, leave the door open."
Kvyat made the slightly outrageous claim that Raikkonen tried to "suicide himself" and also added: "He tried to kill me as well."