Aberdeen have condemned fans who ‘let the club down’ amid unsavoury incidents during Saturday night’s win over Dundee United at Tannadice.

The Dons’ teenage winger Ryan Duncan narrowly escaped being struck by a pyrotechnic device thrown onto the pitch by a travelling supporter, while United manager and ex-Dons boss Jim Goodwin was allegedly hit by missiles from the away end.

Goodwin later said he was ‘extremely disappointed’ after being targeted by ‘that small few of idiots’ during his first match in charge of his new club. The 41-year-old left his post at Pittodrie in late January following a dismal run of results, and he was subjected to verbal taunts throughout his team’s 3-1 Premiership defeat.

Aberdeen say they are now collaborating with United and Police Scotland to identify culprits, and warned those responsible will be ‘dealt with’. A club statement issued on Sunday night also pleaded with fans to continue to give their side ‘fantastic’ backing without endangering others.

The statement said: “The travelling support at Tannadice on Saturday night was impressive in both numbers and voice. Our away form has been disappointing this season, so it was an incredible turnout from Dons fans and everyone at the club is hugely appreciative of the continued support and huge backing.

“Regrettably, a handful of those have impacted the reputation of that amazing support. They have let the club and themselves down. Numerous pyrotechnic devices were ignited and thrown on to the pitch – with one narrowly missing Ryan Duncan. It’s been reported that several objects were also thrown in the direction of Jim Goodwin.

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“Enquiries have begun and we are working together with Dundee United FC and Police Scotland. If and when the culprits are identified, they will be dealt with by both the club and the authorities.

“Our plea to this minority is to continue to give the team the fantastic support that we are known for but do that in a safe and respectful manner that doesn’t endanger either the health or safety of any player, staff or your fellow supporters.”