A 12-year-old was in custody after allegedly trying to take an incendiary device through a security checkpoint at Denver International Airport, police said.

Authorities said Transportation Security Administration agents stopped the juvenile early Wednesday and called police.

Denver police spokesman Sonny Jackson declined to give any details about the device but said it didn't ignite and no passengers or aircraft were in danger.

Authorities didn't identify the youngster or say if it was a boy or a girl.

Officers said the juvenile had the device in a backpack and was traveling to California with family members.