After chants directed at an opposing player, the Rome outfit have been sanctioned.
Serie A has fined Lazio 50,000 euro ($56,000) and ordered the Curva Nord be shut for two games following the racial abuse suffered by Napoli defender Kalidou Koulibaly on Wednesday.
Senegal center back Koulibaly was the subject of boos, whistles and discriminatory songs from a section of home supporters during the guest's 2-0 win at the Stadio Olimpico, which caused referee Massimiliano Irrati to halt the game in the second half for approximately five minutes.
A message appealing for order was read out over the public address system and, while the jeers continued when play resumed, the game was completed without further stoppage.