West Ham are investigating the reason behind West Brom's Jake Livermore confrontation with a fan at the London Stadium amid suspicions it may relate to the death of the midfielder's son, reports BBC Sport.
The England midfielder became involved in an angry exchange with a fan after he was substituted in the second half of his side's 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.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!