Police are investigating an offensive comment made online relating to the disappearance of Mikaeel Kular.
It was brought to Police Scotland's attention by a resident in Edinburgh, where a hunt was launched for missing three-year-old Mikaeel on Thursday.
The remark was made on Twitter by someone in the Greater Manchester area.
A police spokesman said: "Any reports of racist, offensive or abusive comments made online will be thoroughly investigated and those responsible will be brought to justice.
"If you commit an offence, we will investigate it and you will be prosecuted."