LONDON - The "librarian" of a child porn archive accused of amassing nearly 250,000 images pleaded guilty Monday to sending indecent images of children to subscribers in more than 30 countries.

The judge at Teesside Crown Court in Middlesbrough ordered Philip Thompson, 27, of Stockton-on-Tees in northeastern England, to serve at least three years, nine months in prison.

He pleaded guilty to 16 counts that include making indecent photographs of children, distributing indecent photographs of children, taking indecent photographs of children, possessing child abuse images and causing or inciting a child under 13 to engage in sexual activity.