Particular search: htxps://ipv4.google.com/sorry/IndexRedirect?continue=https://www.google.it/search%3Fq%3Dsoffione%26es_sm%3D119%26biw%3D1872%26bih%3D898%26source%3Dlnms%26sa%3DX%26ei%3DndCeVLySJcHNygOpmYLQDw%26ved%3D0CAUQ_AUoAA%26dpr%3D1&q=CGMSBF0hSJcYoaH7pAUiGQDxp4NLT0w7Kh5B77IZ9U3KTEB43pInd6k either in green or in red.
This could be due to a malicious extension or a particular search term (as above).
This type of message also happens when one or more hosts on network makes a call to a Google API without properly registering and using the required Google API key, improperly configures the API call, or other actions that Google considers a violation of their API terms and conditions.
Anyone?
polonus