Burnley are "offering support" to Erik Pieters after social media abuse was aimed at the defender following their 1-1 draw with Arsenal.
Pieters later received abusive messages on a recent Instagram post he made to wish his wife a happy Valentine's Day.
Some of the messages wished harm on his wife and unborn child.
"We are aware of online abuse directed at Erik Pieters following yesterday's game," the club said.
"We are in contact with all relevant parties and offering our support to Erik and his family."
Match officials opted against penalising the Clarets, citing proximity, as they believed the ball only travelled a short distance before it hit Pieters' hand.