"The two clubs remain determined to do everything in their power to ensure that racist behaviour will not be tolerated.
"We will be speaking to the police and the match officials on this matter but no further comment will be made until this process has been completed and the investigations have been concluded."
More top news
Amir Khan has laughed off claims from Floyd Mayweather that he's not a big name and believes the American could be running scared.
Jade Carr had a heart transplant aged 3 for heart failure now needs another transplant after the medication caused her kidneys to fail.
Everton goalkeeper offers words of support for Simon Mignolet.