A Texas mom may have fled the United States with her two children after she failed to return them to their father, who has primary custody of the children, police said.

Nicole Dobry, known as Trang Tran, and the two young children have been missing since Friday, MyFoxDFW.com reported. She last seen at her apartment in the Turtle Creek area of Dallas, The Dallas Morning News reported. Investigators reportedly found her car and purse inside the garage.

The paper reported that the two have a 6-year-old daughter and 2-year-old son.

Dr. Chris Dobry, a podiatrist in Frisco, said he heard from authorities that his ex-wife may have been spotted in the Dallas area after local news reports. But he said his ex-wife is "capable of anything" and he fears for his kids’ lives.

"I believe that if she realizes she’s in trouble, she could kill the children," he said. "This could also be a big game for her and they could be poolside."

Dobry said their divorce was rocky and tensions between the two increased since it was finalized last April. He said he called a couple of her family members that live in Texas on Friday, but has not been called back.

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