Two men and a woman have been arrested on suspicion of inciting racial hatred after comments and a photo of a Gwent Police officer were posted on social media.
The men, 33, from Graig-y-Rhacca, and 31, from Lansbury Park, and a woman, 30, from Aberbargoed, have been released on bail pending further enquiries.
The officer in question was on duty in the Bedwas area, and it is believed the posts were made on Facebook over the weekend of April 16 and 17.
Senior Police Officer for Blaenau Gwent, Caerphilly and Torfaen, Superintendent Marc Budden said: “Whether this type of offence is carried out against a member of the public or one of our own police officers, our response will always be swift and thorough.
“This behaviour, whether in person, via text, social media or online, is unacceptable and there will always be consequences to those who decide to act in this way.”