Middlesbrough have been fined £10,000 after their players "failed to conduct themselves in an orderly fashion" following their defeat by Swansea City.
The incident on 6 March occurred after Andre Ayew scored a 97th-minute match-winning penalty after referee Gavin Ward initially awarded a corner.
Boss Neil Warnock was also fined £7,000 last week for post-match comments.
Boro, who are ninth in the Championship, were also warned about their future conduct.