DETROIT, Mich -- The search continues for a 2-year-old girl who was last seen at a Marathon gas station in Detroit on Thursday.

Michigan State Police issued an Amber Alert for Tangena Hussain after the man she was in the care of told police she disappeared when he went inside the gas station to buy candy.

Jamrul Hussain, 27, was watching the girl while her mother, Nilufa Begum, was at work.

Jamrul and Begum are dating, and although they share the same name, Jamrul is not the girl’s father.

Jamrul was arrested Saturday by Hamtramck police in connection with a separate assault case.

“The case stems back from February of this year. There was an allegation made, and the victim happened to see the individual's photo on the news yesterday, and based on that, she came forward,” said Hamtramck Police Detective Mike Szymanski.

A 15-year-old girl made the allegations against Hussain. The charges against him have not been announced, but sources said they could include felonies. Hussain may be arraigned as early as Monday afternoon.

Police said Jamrul told them he stopped at the gas station before picking up Begum from work at about 9 p.m., and left the girl fastened in his red Geo Prizm while he went inside.

When he returned, the girl was gone, police said.

Police said Jamrul left the gas station and drove to pick up Begum from work at Northland Mall.

"I was asking, 'Where's my daughter; tell me where's my daughter?' and he couldn't even say anything," said Begum.

"He said, 'I will tell you; just come with me,' and he took me to the gas station," she said.

Begum said Jamrul told her he was buying the child gum and juice and when he came out the 2-year-old was gone.

"I said, 'What do you mean she's not inside; why didn’t you call the cops?'" said Begum. "He said, 'I was scared, and I wanted to get you first.'"

“The mother was distraught, but the guy just didn’t really seem, well, his face was blank. It was more like an everyday occurrence to him,” said witness Frederick Panell. “I wouldn’t have thought that something was wrong if the mother wasn’t as hysterical and crying as she was.”

Gas station owner Phid Onwuzrike said, “I was distraught and disappointed and outright upset that such a thing could happen, if it did happen, here.”

Surveillance tapes from the gas station were handed over to authorities, but investigators said a technical glitch prevented Jamrul’s car and the child from being seen. Investigators said Jamrul was filmed entering the store.

Police dogs searched the Hamtramck home Begum shares with Hussain and also searched Jamrul’s mother's house on the Detroit-Hamtramck border, but said they were unable to find any clues into the girl's disappearance.

Sources close to the police’s investigation said polygraph tests were administered but would not confirm to who or the results.

Police said Jamrul and Begum are cooperating with the investigation. The FBI has also become involved.

Begum, who is reportedly staying with family, told Local 4 Sunday that she does not believe Jamrul has anything to do with her daughter's disappearance.

Begum also said she has not slept for the past three days.

"Please help me get my baby back. She's only 2 years old. She needs her mommy," said Begum.

The girl is described as East Indian with a light-brown complexion.

She is 35 pounds with black, shoulder-length hair. She was last seen wearing a long-sleeved brown T-shirt and white nylon cargo pants.

Anyone with information is asked to contact Detroit police at 313-596-1240.