6 Manhattan Schools Get Suspicious Packages With Powder: NYPD

Updated 8:30 p.m. Friday, to include a sixth suspicious package.

NEW YORK, NY — Suspicious packages containing an unknown, white powdery substance have been mailed to six Manhattan schools starting on March 10, police said Friday.

Each school received a plain white envelope with a U.S. flag stamp and an address written in block letters, containing the white powder. All were sent through the U.S. Postal Service, and the most recent one was received on Friday.

"The contents of each envelope was screened and determined to be non-hazardous," police said in a statement. "It appears that the motive of the sender is to cause disruption and alarm."

Police have not yet determined what the substance was, an NYPD spokesperson said.

According to the Daily News, the first five schools involved were: Robert F. Wagner Middle School on East 76th Street, Montclare Children’s School preschool on Amsterdam Avenue, River Park Nursery School near West 95th Street, the High School of the Liberal Arts on East 33rd Street, and the NY Kids Club preschool on Amsterdam Avenue.

At least one of the schools, River Park, was evacuated Tuesday after the package was found.

Police asked anyone with information about the packages to contact the NYC Terrorism Hotline at 888-NYC-SAFE. Anyone who receives a suspicious package should call 911, police said.