Portsmouth's Championship game with Derby County was marred by an incident where objects were thrown at an assistant referee. The incident occurred in the 74th minute of the 2-2 draw at Fratton Park's North Stand. A soft drink bottle was among the objects thrown by a spectator. The club made an announcement over the stadium's public address system condemning the behaviour and calling for witnesses soon after. Hampshire Police are investigating the incident, which has also been reported to the Football Association. Portsmouth were fined £50,000 by the FA in January after admitting breaching FA rules in relation to failing to control spectators. The club was also warned about its future conduct and that any further instances could lead to similar financial punishments or other sanctions. The incident could lead to the club facing disciplinary charges. Portsmouth said in a statement that objects thrown on to the pitch by any spectator constitute a criminal offence. The club appealed to anyone with information about the incident to email them in confidence at info@pompeyfc.co.uk. The investigation continues and the club thanks those supporters who have already come forward with information. The incident is a concern for the club, which has been working to improve its reputation. The club's statement emphasized that any spectator(s) identified as having thrown the objects will be subject to a significant club sanction, as well as a potential criminal investigation. The FA rules are clear and the club must take responsibility for the actions of its spectators. The incident has raised questions about the safety and security of players and officials at Fratton Park. The club must take steps to prevent such incidents in the future.