"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
The UK will commemorate the Centenary of the Battle of the Somme in Manchester.
Vulnerable pensioners had to evacuate a day centre in Manchester after receiving threats of 'a backlash against the black community’.
A man from Manchester has been jailed for 13 years after he raped and sexually abused three children.