The Malaysian Moto2 Grand Prix has been red flagged on the opening lap after a massive multi-rider incident on the back straight.

Axel Pons fell - possibly after contact - as he accelerated onto the straight. Following riders swerved to avoid the Spaniard's Kalex before it was hit head-on by a rider at the back of the field.

Several further competitors were subsequently brought down in the mayhem.

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In total Zaqhwan Zaidi, Ezequiel Iturrioz, Decha Kraisart, Fadli Immammuddin and Pons were involved.

Pons walked away - with the arm of his leathers missing - and, miraculously, all the riders involved have been "deemed ok".

Pons' team-mate Esteve Rabat had been leading the race, while title leader Scott Redding put in a storming start to carve his way up the order from tenth to fourth.

The restart will be over twelve laps.