West Ham are investigating the reason behind West Brom’s Jake Livermore confronting fans at the London Stadium amid suspicions it may relate to the death of the midfielder’s son.
The England midfielder became involved in an angry exchange with fans after he was substituted in the second half of his sides 2-1 defeat.
Livermore and his partner lost their newborn son Jake Junior in May 2014.
Neither club has commented about the precise reasons behind the incident.
West Ham are leading the investigation.