Amazon has shut down construction of a new US warehouse after seven nooses were found on-site in the last month.
Construction has been stopped at the Windsor, Connecticut site until security measures have been put in place.
Amazon said it was “deeply disturbed by the incidents happening”.
It has offered a $100,000 (£70,589) reward for information on the nooses, the first of which was discovered on 27 April.
The looped rope is synonymous with the extrajudicial hangings, or lynchings, of mainly black people in the United States in the late 19th and early 20th Centuries.
Amazon spokeswoman Kelly Nantel said: “We continue to be deeply disturbed by the incidents happening at the construction site in Windsor and have ordered it’s shut down until necessary security measures can be put in place.
“Hate, racism or discrimination have no place in our society and are certainly not tolerated by Amazon – whether at a site under construction like this one, or at one that we operate.”
She added the firm was working with the town and Windsor Police Department on the matter.
