Colombian referee Oscar Ruiz (L) hands a red card to Nigeria's midfielder Sani Kaita after the latter kicked Greece's defender Vasilis Torosidis (unseen) during the Group B first round 2010 World Cup football match Greece vs. Nigeria on June 17, 2010 at Free State Stadium in Mangaung/Bloemfontein. AFP PHOTO / HOANG DINH NAM

South African police said Monday they will keep a close eye on Nigerian mid-fielder Sani Kaita after he received more than 1,000 email death threats following a red-card last week.

“It is alleged that Mr Kaita has received numerous death threats via e-mail and according to the team’s spokesperson these threats emanate from Nigeria,” said police spokeswoman Sally de Beer. “The team security liaison officer, with the Nigerian team has been requested to pay close attention to Kaita and to ensure that the stringent security measures already in place are sustained.”