A woman and her dog were both fatally struck by a car in Long Island Tuesday morning, police said.

Skye Brunetti, 25, had just dropped off her 5-year-old son at a school bus stop and was walking with her dog when she was hit by a 2007 Chrysler sedan that had hopped the curb at Union Boulevard in East Islip, authorities said.

The car then crashed into a light pole and knocked down wires, police said.

It's unclear what caused the driver, 50-year-old Barbara Cottone, to lose control of the vehicle, but authorities said she hasn't been charged with any crimes.

Brunetti was pronounced dead at the scene. Authorities said her dog was also killed.

Cottone was taken to the hospital with minor injuries.

Brunetti's brother, T.J. Linder, said he thought speed played a role in his sister's death.

"This is just speed, everyone's speeding down this road," he said.

Friends said that Brunetti was a stay-at-home mom who "cared about her son more than anything" and was following her daily routine when she was killed.

"She was the best person you could think of," said Autumn Miller. "She was a beautiful person and I loved her a lot."