The Irish Horseracing Regulatory Board confirmed that it was investigating “other content on social media” after a video, which shows an individual appearing to sit on a dead horse, was published on Monday evening.
The footage follows just two days after trainer Gordon Elliott confirmed that an image of him taking a phone call while sitting on a dead horse was genuine.
The coach is “fully cooperating” with an IHRB investigation into the incident after the photo of his galloping was posted on Twitter on Saturday night.
On Tuesday morning, the IHRB posted on its own Twitter account that a further investigation was underway.
The statement read: “The Irish Horseracing Regulatory Board is aware of the release of new content on social media and the matter is under investigation.