What to Know
- Federal and local authorities are investigating multiple cases of letters containing white powder that were mailed to facilities in CT.
- The substance that prompted investigations into four white powder incidents in Hartford Wednesday was baby powder.
- A man is being questioned in connection with these incidents and remains in custody on unrelated charges.
Authorities investigating several cases of letters containing white powder that were mailed to facilities in Connecticut have uncovered more letters connected to the case.
The FBI, USPS, US Marshals Service, Connecticut State Police and local departments are investigating multiple incidents of letters containing white powder delivered to both government and non-government organizations over the last few days. At least four of those incidents were in Hartford Wednesday. New Haven authorities are also investigating several similar cases.
According to the US Attorney’s Office, investigators seized unmailed letters and stopped some letters from reaching the recipients. Authorities are also warning potential recipients to look out for anything suspicious. Some letters continue to arrive at new locations.
Connecticut State Police said that to date, no one who had contact with any of the white powder suffered any illness or injury. Anyone who receives a suspicious package is encouraged to call 911.
The U.S. Attorney's Office said 51-year-old Gary Gravelle, of New Haven, is being questioned in connection with these incidents. Gravelle was arrested on a supervised release violation unrelated to this case and is in custody. Officials said no charges have been filed in connection with the white powder incidents.
Gravelle is known to federal authorities. In 2013, he was sentenced in Bridgeport federal court to 70 months in prison for mailing threatening letters and he was released from federal prison in November 2015.