A per­son with knowl­edge of the pun­ish­ment tells The Asso­ci­at­ed Press that at least three NFL head coach­es have been fined $100,000 for vio­lat­ing the league’s rules that they wear face cov­er­ings on the sideline.

The per­son, who spoke on con­di­tion of anonymi­ty because the league wasn’t announc­ing spe­cif­ic fines, said Denver’s Vic Fan­gio, San Francisco’s Kyle Shana­han and Seattle’s Pete Car­roll were each docked $100,000. Their teams were fined $250,000 each.

More fines could be com­ing as sev­er­al oth­er coach­es vio­lat­ed the league’s rules requir­ing coach­es to wear cov­er­ings over their mouths and noses at all times. Play­ers are exempt from these protocols.

Among the vio­la­tors were Patri­ots coach Bill Belichick and both coach­es in Mon­day night’s game, Jon Gru­den of the Raiders and Sean Pay­ton of the Saints.

Gru­den wore his face mask like a chin strap and Pay­ton wore his gaiter like a turtleneck.

The pun­ish­ments come a week after the NFL warned all 32 teams in a memo about fol­low­ing the rules for wear­ing face cov­er­ings dur­ing the coro­n­avirus pan­dem­ic lest they put the NFL sea­son at risk.

If the fines, which were ear­li­er report­ed by ESPN and NFL Net­work, prove inef­fec­tive, the league could hand out stronger discipline.

AP Pro Foot­ball Writer Bar­ry Wilner con­tributed to this report.