Police in Philadelphia are searching for two girls who disappeared during a trip to a nearby playground.

Taliya Hamilton, 14, and Brianna Boyd, 3, were last seen in the playground, about two blocks from their home, at about 8 p.m. Sunday night, MyFOXPhilly.com reported.

Police have searched the girls' home and local areas they've been known to frequent, a police spokesman told FOX News.

No Amber Alert has been issued because police don't have a reason to suspect a danger to the girls. But the length of time they have been missing is a concern, police said.

Michelle Hamilton, the girls' mother, told MyFOXPhilly she doesn't think a stranger abducted her children, noting that her older daughter recently became rebellious and has been running off for a day or two at a time.

"Taliya's just been walking off lately," Hamilton told the station. "I'm not even sure what's going through her mind right now. I don't know what possessed her to take Brianna with her. I mean, if she wanted to walk off or go somewhere, she could have Brianna back in the house or brought her back across the street."

Taliya Hamilton was described as 5 feet 6 inches tall, about 115 pounds, with brown eyes and brown, straight hair down to the middle of her back. She was last seen wearing a gray sweatshirt, blue jeans and white sneakers.

Her sister is 3 feet 4 inches, about 30 pounds, with brown eyes and short, curly black hair. She was wearing a red and black jacket, black pants, black sneakers and had different colored barrettes in hair.

Anyone with information is asked to contact the Philadelphia Police Department.

Click here for more on this story from MyFOXPhilly.com.