A TORRENT of racist abuse was posted on Essex Police's Facebook page following an appeal.
They had asked for information after windows were smashed at a mosque in West Road, Westcliff.
An Essex Police spokeswoman said: "Essex Police is very concerned at the number of racist comments posted against an earlier appeal made on Friday afternoon about criminal damage to a mosque in the Southend area."
She said they were now reviewing their policy to prevent this happening again.
She added: "We will not tolerate racist language and have passed on details of the comments to our local neighbourhood crime team. These will be reviewed and, if necessary, action will be taken against those who made them."