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Relative of missing 5-year-old says she saw signs of abuse before he disappeared

Lucas Hernandez, 5, was reported missing on Saturday. The FBI has joined the search for the little boy. 

WICHITA, Kan. — A 5-year-old boy who has been missing since the weekend may have been the victim of abuse, a relative told ABC News.

Lucas Hernandez disappeared from his Wichita, Kansas, home around 3 p.m. on Saturday, police said.

Lucas’ great-aunt Sally Rasmussen, who lives in New Mexico, told ABC News that she saw marks on the boy's arms and on his cheek in a photo of him that she saw last May.

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Rasmussen, who said she's worked with at-risk youth before, said she is familiar with the possible signs of abuse and reported the marks to Kansas Child Protective Services.

Rasmussen said relatives grew more concerned when Lucas and his father, Johnathan Hernandez, visited New Mexico in November. She said they told her they saw more signs of abuse and reported them to authorities in New Mexico.

Rasmussen does not believe Lucas’ father hurt his son, however.

“He loves his son dearly!” Rasmussen wrote in a Facebook message to ABC News.

She added that she believes Hernandez, who often travels out of state for work, was out of town working when Lucas disappeared. According to police, Lucas' stepmother told investigators she last saw him in his bedroom just before she took a shower and fell asleep. Police were called to the home about three hours later.

The New Mexico Children, Youth and Families Department told ABC News that its cases are confidential and did not confirm whether it has an open case involving Lucas.

The Kansas Department for Children and Families, of which Child Protective Services is a part, said it couldn't share any information on its cases either, but expressed worry for Lucas.

“We share the public’s concern regarding Lucas Hernandez," Theresa Freed, communications director for Kansas DCF, said in a statement to ABC News. "In the event the agency has information, we will share it with law enforcement, assisting them as requested.”

Wichita police confirmed in a media briefing Monday that they have had contact with the family before, but did not elaborate on the nature of that contact.

Authorities said they have as many as 100 officers working the case and have searched the Hernandez home as well as Wichita’s Chisholm Trail Park, Grove Park and Harrison Park using horses, dogs and drones, but have found no sign of Lucas.

At a prayer vigil on Monday night, Lucas’ father told ABC affiliate KAKE he was thankful for the community's help.

“I think it’s good to see people in this community treating Lucas like he’s their child," Hernandez said. "This is a serious thing and we want him home.”

The family is cooperating with the investigation, authorities said.

ABC News has tried to contact other relatives of Lucas, but did not immediately receive a response.

This article was written by Whitney Lloyd, ABC News.