Police in Derry say they are "aware" of a video that appears to show masked men firing shots into the air.
The video appears to show three masked men, all dressed in dark clothing, standing in front of an INLA mural in the Bogside area of the city at night time. One of the men holds a photograph as another appears to fire shots from a pistol into the air.
The video ends with a message about "veteran Republican Sean McLaughlin".
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A funeral was held for Sean McLaughlin in Derry on Saturday. Requiem Mass was held at St Mary's Church in Creggan, followed by interment in the City Cemetery.
According to a family notice, the Derry man died "peacefully at the Royal Victoria Hospital" in Belfast on March 18.
In a statement, a spokesperson for the PSNI said: "Police in Derry/Londonderry are aware of a video on social media which appears to show masked men firing shots into the air.
"Enquiries are being conducted and officers would ask anyone with any information to contact them at Strand Road on 101, or online using the non-emergency reporting form via http://www.psni.police.uk/makeareport/. You can also contact Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/."
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