An object was reportedly thrown from Newcastle United's dugout towards celebrating Liverpool staff after the host's winner last night.
Fabio Carvalho's winner led to clashes between the coaching teams in the dugout, with Eddie Howe's staff furious that referee Andre Marriner allowed nine minutes of added time despite only five minutes being allocated.
BT Sport's coverage after the game showed one of the away side's staff seemingly throw a missile across at the home dugout as they celebrated, kickstarting a confrontation and some verbal sparring between the two sides.
After the full-time whistle, the Magpies went to the away end to thank their travelling support - who were exceptionally vocal throughout - but were also met with audible boos and jeers from the remaining home support as they left the pitch.