Iwobi was among the Everton players to approach the away end, throwing his shirt into the crowd only to see it thrown back moments later.
Everton fans could not hold their anger and vented it on Frank Lampard and his men after watching them fall 3-0 to Bournemouth.
Police and match stewards were on ground to calm the situation following a heated exchange involving the Toffees fans and club captain Seamus Coleman.
Lampard was also seen pulling his goalkeeper Jordan Pickford away after the full-time whistle.
Bournemouth beat Everton 4-1 in the Carabao Cup in midweek and in the space of four days, beat them again in the Premier League and sending them to the relegation zone.
Alphonsus Odumu 5 w
Iwobi