Updated

Authorities have released a sketch of what they think a young girl, whose remains were discovered inside a storage box that washed ashore on Galveston Bay, looked like.

Investigators also said a forensic dental examination has narrowed the girl's age to between 2 and 3 years.

The girl, whom police call "Baby Grace," is described as white, 32 to 35 inches tall and weighing 25 to 30 pounds.

She had waist-long, wavy blond or light brown hair. She was wearing a Target-brand pink, flowing skirt, a pink or red shirt and white light-up tennis shoes with purple flowers on them.

Click here to see a sketch of the girl and a report from MyFoxHouston.

Authorities have been inundated with hundreds of calls since asking for the public's help on Thursday, said Galveston County Sheriff's Department spokesman Maj. Ray Tuttoilmondo.

"We are getting tips literally from all over the country," he said. "We're going through every single one. This tells me that people are concerned."

Galveston County Crime Stoppers has set up a memorial fund to pay for the little girl's funeral and an account to offer rewards for anyone who helps investigators lead them to the killer. Donations can be made to Galveston County Crime Stoppers.

A fisherman found the girl late Monday night. Her body was inside a blue plastic utility box that washed ashore along the Intercoastal Waterway.

The Galveston County Medical Examiner's Office ruled the child had been dead for at least two weeks and sustained a skull fracture. The cause of death has not been determined but authorities are treating the case as a homicide.

Anyone with information is asked to call the Galveston County sheriff's Office at 409-766-2222, the agency's tip line at 866-248-8477 or any Crime Stoppers organization.

A prayer vigil for the girl is set for Sunday afternoon in Galveston.