LAS VEGAS -- Authorities Saturday called off an Amber Alert in the search for an abducted Nevada boy. But they aren't saying why.

IMAGES: People Involved In Missing Boy Case

Nevada officials canceled the alert for 6-year-old Cole Puffinburger. FBI spokesman Joe Dickey later said the boy has not been found and that Las Vegas police and the FBI "are not calling off the search."

While they did not say why they called off the alert for Cole Puffinburger, 6, they did confirm that his grandfather, 51-year-old Clemons Tinnemeyer, is in custody in California.

Puffinburger was taken from his home on Wednesday, police said. Two Hispanic men disguised as police broke in, tied up his mother and stepfather and abducted him at gunpoint. He has not been seen since.

After Puffinburger's kidnapping, Metro police named Tinnemeyer as a person of interest in the investigation. He was last seen by his family in August after reportedly stealing $8 million from a Mexican drug cartel. Some of this money has been obtained since Tinnemeyer's arrest, Metro police said.

Once California police were able to apprehend Tinnemeyer in San Bernardino County, Metro police canceled the Amber Alert. They said that though they are still searching for the boy, they did not feel the continued alert would be necessary.

Currently, Metro is looking for a second person of interest, Jesus Gasteleon. Gasteleon is in his 30s and may have ties to the cartel and family.

Puffinburger's mother is now also being investigated in connection with her involvement in the cartel, Metro police said. They did not say if she played a part in Puffinburger's kidnapping.

Puffinburger is 3 feet 11 inches tall and weighs about 48 pounds. He has blond hair, blue eyes, distinctly stained front teeth, an overbite and wears prescription, silver-rimmed glasses. He was last seen wearing a black, zip-up, hooded sweatshirt with white, black and blue stars on it; a black John Cena WWE wrestling shirt; dark jeans; a belt; white socks; and black Vans sneakers.

The men are described as having Hispanic accents. One man is described as in his early 30s, 5 feet 7 inches tall and weighing 150 pounds. He has black, shoulder-length, slicked-back hair. He was last seen wearing a white T-shirt and blue jeans, Rivera said.

Anyone with information is asked to call Metro police at 702-828-3111.