3-year-old Carla Espinosa-Alvarez kidnapped from Las Vegas foster home

(CBS/KLAS) NORTH LAS VEGAS, Nev. - North Las Vegas police are looking for two suspects who kidnapped 3-year-old Carla Espinosa-Alvarez from her foster home Sunday evening.

Carla's foster mother told police that around 9:30 p.m. a masked man and woman entered her home, and that the man held her at gunpoint while the female suspect searched the home, specifically looking for Carla. She found the child upstairs and  carried her out of the house, Carla's foster mother told CBS affiliate KLAS.

"At this point in the investigation, we believe that she is endangered," said North Las Vegas Police Officer Chrissie Coon.  "We do know these suspects to be armed, and we do ask the public if they have information regarding the whereabouts, or if they possibly see this little girl out there, (they) have to call authorities or call 911. Don't try to contact these people on their own."

Detectives want to speak with Carla's biological mother, Maria Espinosa-Alvarez, 30, who is believed to live in Mexico and has made threats to take Carla out of the foster home. Investigators are not calling the biological mother a suspect, reports the station.

"At this point, they're exhausting all of their resources and all the possibilities that could surround how this young girl was taken," said Coon to the station.

The suspects are described as Hispanic, about 5 feet 6 inches tall, with black hair and brown eyes. They were dressed in all black with brown masks or bandanas over their faces. They both spoke fluent Spanish.

Carla was last seen wearing a pink short sleeved pajama shirt and pink pajama pants. She is 3 feet 2 inches tall, weighing 50 pounds, with dark brown hair and brown eyes. Four of Carla's top front teeth are silver-capped.

Anyone with information about this abduction is asked to contact the National Center for Missing and Exploited Children at 1-800-THE-LOST.