BATON ROUGE - An unusual, mysterious person wearing a mask and gloves while passing out flyers to businesses late at night likely spooked people into thinking something far more dangerous was unfolding this week.

Federal and local authorities determined there was no threat.  Investigators have found no evidence of any harmful material on the flyers. The East Baton Rouge Sheriff's Office says it does not appear that a crime took place at this time and that there is no plan to make any arrests. 

A handful of businesses on Coursey Boulevard shut down around noon Monday after bank workers said they became sick after handling strange flyers left in a drop-off box, triggering a huge law enforcement response. 

Businesses shared video and images with WBRZ Tuesday showing a person wearing a mask and gloves delivering the flyers to at least two businesses.  At one of the businesses, the man delivered the mailers around 3 a.m. Monday.   

Click HERE to watch the video.

Three bank workers at one of the five - or more - businesses to receive the flyers sought medical treatment at a hospital after touching the mailers.

The Baton Rouge Fire Department said it later discovered the same flyers were left at roughly five other businesses in the area.

Kyle Labbe works at a business nearby and was surprised when he came outside to fire trucks and HazMat vans.

"We were sitting upstairs in our sales meeting and our office manager told us to stay upstairs, and after a while she told us to come outside. We had no idea what was going on," Labbe said.

A Baton Rouge HazMat team said Monday that no hazardous material was immediately detected on the flyers. On Tuesday, officials said that federal agents with the FBI also found nothing harmful.

The fire department dispelled social media rumors Tuesday claiming that people were walking around handing out fentanyl-laced cards "for the holidays."