Bulgaria's Sports Minister Svilen Neykov has ordered a special review of the national lottery after the same numbers were picked in straight draws.

The numbers 4, 15, 23, 24, 35, and 42 were drawn on September 6 and again on September 10 in consecutive lottery rounds.

The probability of this happening is 4.2 million to one, mathematician Mihail Konstantinov commented, although he added that such coincidences could happen.

Three of the numbers also appeared in the September 13 draw.

Lottery deputy chairwoman Maria Yaneva excluded any possibility of manipulation, telling the newspaper on Wednesday that the numbers were drawn in different order each time.