The FBI is offering a $20,000 reward for information about a 2-year-old girl who vanished 10 days ago.
Family members last saw Myra Lewis playing with her sister at their home in Camden, Miss.
A widespread search by local, state, and federal law enforcement agencies failed to find the girl.
"We are confident that information will be uncovered which will lead to Myra's return, and we continue to solicit the public’s assistance in locating this little girl," Daniel McMullen, FBI special agent in charge at the bureau's Jackson Division, said in a statement.
The girl was described as 37 inches tall, weighing approximately 27 pounds. She was last seen between 10:30 a.m. and 11 a.m. on March 1, wearing white or khaki-colored pants, a turquoise sweater with a bear on the front, and pink tennis shoes, the statement said.
It added the search has included specialist ground and air teams and used up "significant resources." According to a report by NBC station WLBT, the FBI is also getting out information to its offices in Tennessee, Alabama and Louisiana.
The girl's mother, 35-year-old Ericka Lewis, was arrested Friday on a probation violation following a welfare fraud conviction, as well as a charge of being a felon in possession of a firearm, The Associated Press reported.
Madison County Sheriff Randy Tucker told the AP neither offense was connected to her daughter's disappearance.
WLBT said Lewis appeared in court Monday regarding the firearm charge and her bond was set at $5,000.
The Associated Press contributed to this report.