A mother and daughter found dead inside a  high-rise in Ventnor, N.J., on Sunday morning died from blunt-force trauma, authorities said.

Elaine Rosen, 87, and daughter Michelle Gordon, 67, were found at 10:25 a.m. in the Vassar Square Condominiums at 4800 Boardwalk, the Atlantic County Prosecutor's Office said.

Authorities called the deaths "suspicious" and said there was no danger to the public.

Sharon Nalitt, 51, said police arrived at the building while she was eating at a downstairs cafe. She said the victims were found inside an apartment on the eighth floor.

"It's sad and bizarre," said Nalitt, who owns a condo on the 19th floor and lives much of the year in Florida. "It's a very family-oriented building."

One resident said someone called down from the unit Saturday night and requested that a taxi be called.

The Boardwalk condo building with a side pool is typically filled with summer and year-round residents. Residents said management had been exercising extra caution since the bodies were found Sunday.

Neighbors said that the victims were not well-known in the building, and that no obvious signs of violence were heard that night. "It was not someone running in and out of rooms," Merle Brodsky said. "It's tragic."

Autopsies of the victims have not been completed. Police have made no arrests.