Federal prosecutors announced charges against eight more people as part of a long-running investigation of young men who left the United States to fight in Somalia.

As many as 20 young Somali men have left Minnesota over the last two years for Somalia and are believed to have joined the Somali terror group al-Shabab. At least three have died.

The charges unsealed Monday in Minneapolis include allegations that the men provided financial support to those who traveled to the East African country to fight on behalf of al-Shabab. The charges also allege that they attended al-Shabab terrorist training camps and fought on behalf of al-Shabab.

One of the eight named Monday is Mohamud Said Omar, who is currently being held in the Netherlands.