Pit Bulls Accused of Violent Attack

Two pit bulls allegedly belonging to NFL wide receiver Demaryius Thomas attacked a woman and her pet dog this week causing major injuries ... and now officials have launched an investigation.

Jennifer Savage told WSB-TV in Atlanta she was hanging out on her front lawn with her own dog Thursday when out of nowhere, 2 pits went after her pooch.

"I look up, not even paying attention, and I see two pit bulls charging at me, showing their teeth and growing at me," Savage said.

The woman says she tumbled down a hill trying to protect her dog from the pit bulls -- but couldn't stop the animals from taking "huge chunks" out of her dog.

Savage says she suffered bite wounds to her arms and legs -- and…