Monaco Grand Prix: Early red flag after huge Perez, Haas crash.

MONTE CARLO, Monaco -- A collision involving Sergio Pérez and both Haas drivers forced the Monaco Grand Prix to be suspended on the first lap.

On the hill which runs up from Turn 1, Haas driver Kevin Magnussen collided with Perez as the corner drifted away to the right side.

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Magnussen had been on the inside of Perez as the space closed up.

The contact sent Perez into a heavy collision with the wall and his car collected Magnussen's teammate, Nico Hülkenberg, as he came back onto the race track.

Perez's car was badly damaged, while both Haas cars were unable to continue.