FOUR riders were involved in an explosive crash at the Moto2 race at the Motorland Aragon in Spain.

An exploding gas tank erupted into a huge fireball, engulfing most of the track.

Xavi Cardelus lost control of his bike, flying off it before it flipped several times, causing the fuel tank to break off the bike and land in the middle of the track.

The red flag was immediately shown.

Amazingly, no competitors suffered any major injuries.

The race was restarted without Cardelus, whose bike was irrepairable.