Spanish rider Toni Elias riding a Moriwaki won the San Marino Moto2 here on Sunday for his fourth successive victory in the category.

The 27-year-old confirmed his place atop the overall standings with his sixth victory of the season beating home compatriot Julian Simon, riding a Suter, and Swiss Thomas Luthi on a Moriwaki was third.

Elias, who added a further 25 points to his advantage over second placed Andrea Iannone, was well clear when early pacesetter Shoya Tomizawa of Japan had a sickening crash.

The Japanese rider had dropped back down the field but was still in the leading sextet when under pressure from the fast charging Italian Alex de Angelis he came off his bike on the track.

Neither de Angelis nor British rider Scott Redding were able to avoid hitting Tomizawa, who was propelled over 40 metres and off the track into the gravel.

Both de Angelia and Redding appeared to be alright as they groggily got to their feet, but Tomizawa was immediately stretchered away to the medical centre.

A MotoGp spokesman later told the BBC that the 19-year-old Tomizawa, winner of the season opening Qatar Grand Prix, had been taken to hospital 30 kilometres away and was undergoing further unspecified treatment.