Eleven people have been arrested as part of a police investigation into the Serbian state lottery after a winning number appeared on screen before it was actually drawn.

As the video above shows, the incident took place when the presenter announced the numbers from the yellow balls on Tuesday night's live televised draw.

The fourth number to be drawn was 27, but was shown on the television screen graphic as 21. However, number 21 did then come out as the fifth and final ball.

The Belgrade Higher Public Prosecutor's Office issued a warrant and police are now looking into whether the result had been set up beforehand.

According to reports, the host of the draw, Aleksandra Gudelj, is one of those being held by police.

"When it comes to the state lottery of Serbia, we are fully aware that this case caused widespread alarm among citizens, which is why we will deliver timely information to the public about the results of the investigation," the Republic Public Prosecutor Zagorka Dolovac told Tanjug News Agency.

Serbia’s Prime Minister Aleksandar Vucic said if there had been any criminal activity “these people will be brought to justice,” adding:

“The path to prison is very short.”

Do you think the draw was pre-determined? Let us know in Comments below.