Witnesses say the woman was pulled under the surface of the water by an alligator.

An alligator attacked a woman who was walking her dog, pulling her underwater in a lagoon and killing her, authorities in South Carolina said.

The attack happened around 9:30 a.m. Monday at the Sea Pines Resort on Hilton Head Island, the Beaufort County Sheriff's Office said in a statement.

Witnesses say the woman was pulled under the surface of the water by an alligator thought to be about 8 feet long.

Beaufort County Coroner Edward Allen identified the woman as 45-year-old Cassandra Cline. Allen scheduled an autopsy at the Medical University of South Carolina.

According to the Press and Sun Bulletin, Cline was a kindergarten teacher in the Union-Endicott School District, just outside of Binghamton.

The woman's dog did not appear to have been hurt, the sheriff's department said.

The alligator believed to have been responsible for the attack was located later Monday, the sheriff's office said without specifying exactly what happened after it was found.

In a statement Monday, the resort said it is working with authorities "to ensure necessary access to the site while the investigation is underway."

"We are extremely saddened by this news and will share information with the community as it is made available," Sea Pines said in the statement.