SEATTLE -- Investigators have arrested a juvenile in connection with the release of a variant of the "Blaster" computer worm, which crippled thousands of computers worldwide last month.

It was the second arrest stemming from the release of variants of the worm, but detectives have yet to determine who created the main version.

Prosecutors refused to release any information about the suspect, not even the youth's gender or home state. They cited confidentiality rules protecting juveniles accused of crimes.

The U.S. Attorney's Office in Seattle said in a statement that the youth was arrested as a juvenile for intentionally causing damage to protected computers.

The variant the juvenile allegedly created was known as "RPCSDBOT." Prosecutors did not say how many computers they believe were infected.

Collectively, different versions of the virus-like worm, alternately called "LovSan" or "Blaster," snarled corporate networks worldwide, inundating 1.2 million computers.