Two men were detained and ejected from Millwall’s The Den for allegedly making gestures mocking the Leicester City helicopter crash during Saturday’s 3-2 FA Cup defeat by the Foxes.
Footage shared on social media appeared to show fans making helicopter gestures towards the Foxes’ support.
The Metropolitan Police said two men will be summonsed for an offence under the Public Order Act.
Inquiries are ongoing to locate a third man in connection with the incident.
Leicester’s late chairman, Khun Vichai Srivaddhanaprabha, and four others were killed when the helicopter they were in crashed outside the King Power Stadium on 27 October 2018.
In November, a Sunderland fan who mocked the crash was banned from attending matches for three years.