Schumacher later defended his actions during qualifying.
"I was amazed at how tough the stewards' decision was," he said. "I can understand that, from the outside, things might seem a bit strange. I am sorry that Fernando's lap was ruined and it was definitely not my intention to do that."
Raikkonen ran Alonso close through the first 50 laps, but on the 51st Raikkonen's race ended when his engine overheated.
"There was a small fire caused by a heat shield which damaged wiring, and that was the end of the race for me," Raikkonen said.
It was the same problem he had in the first practice on Thursday when he ran just three laps.
After Raikkonen dropped out, Alonso eased to a 15-second victory over Juan Pablo Montoya and David Coulthard. Montoya drives for McLaren but the Colombian driver may be pushed out by Alonso when Alonso joins the team next season.
Coulthard won the Monaco race twice for McLaren, and his third place for Red Bull on Sunday earned the first podium in the team's short history.
With his 12th career victory, Alonso has 64 points, second-placed Schumacher 43, and Raikkonen and Alonso's teammate Giancarlo Fisichella 27 each.
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