WINDSOR, Conn. (AP) — Amazon has temporarily shut down a new warehouse construction site in Connecticut after a seventh noose was found hanging over a beam.

Local police are calling the series of incidents “potential” hate crimes.

Another rope tied like a noose was discovered Wednesday at the site in Windsor.

Law enforcement officials said Thursday that they have intensified their investigation, and the state NAACP called for the suspect or suspects to be brought to justice.

“We’re here to make sure that people are safe,” said Scot X. Esdaile, president of the state NAACP. “We’re making sure that the voices are heard and that this situation is dealt with in a professional and adequate way.”

Amazon says it is closing the site until Monday so additional security measures can be put in place.

A $100,000 reward is being offered for information that would identify any suspects.