HUDSON (CBS) – A Hudson first grade teacher has been identified as the woman killed when she was hit by a tractor-trailer tire while driving on Route 2 in Fitchburg Wednesday afternoon.

Forest Ave. School principal David Champigny said in a letter to parents that Erin MacKay was a mother, “amazing educator, and above all else a kind and caring person.”

READ MORE: At-Home Rapid Antigen COVID-19 Testing Gaining Popularity Ahead Of Holidays

“We are deeply saddened by this loss and know this will be a difficult time for our students, families, and staff. As a school community we are here to support Erin’s family and our larger school family,” Champigny said.

Forest Ave. School staff and counselors will be made available for members of the community impacted by MacKay’s death. A memorial has been set up outside the school.

“She was a magical teacher,” said Maria Ricciuti, who worked with MacKay. “She was always smiling, always had a kind word and was very soft-spoken and was like a mother to all the kids.”

Hudson Superintendent of Schools Marco Rodrigues called MacKay a “beloved teacher.”

READ MORE: 'This Is What Really Matters': Patriots TE Jonnu Smith Spreads Joy At Boys And Girls Club In Dorchester

Erin MacKay (WBZ-TV)

“Ms. MacKay was an amazing educator, known by families and colleagues as a kind and caring individual who cared deeply for her students,” said Rodrigues. “Her unexpected passing is a tragic loss for her family and for the Hudson school community.”

Massachusetts State Police said the 42-year-old Templeton woman died Wednesday after her Jeep was struck in the windshield by a tire and rim on Route 2 around 1 p.m.

MacKay was rushed to Leominster Hospital, then flown to UMass Medical Center but did not survive.

Police are still working to determine where the tire and rim came from. Troopers found one vehicle that was in the area at the time, but are not yet sure if the car came from there or another still unidentified driver.

MORE NEWS: Families Being Forced Out Of Malden Apartments By Charter School That Purchased Building

Anyone with information is asked to call State Police at 978-537-2188.