Updated

Leaders of the nation's largest Somali community say some of their young men are still being enticed to join the terror group that has claimed responsibility for the deadly mall attack in Kenya.

Six years have passed since Somali-American fighters began leaving Minnesota to become part of al-Shabab. Authorities call the migration a "deadly pipeline" of men and money, and it has persisted despite concentrated efforts to shut it down.

Now the Somali community is dismayed over reports that a few of its own might have been involved in the violence at the Westgate Mall in Nairobi.

Since 2007, at least 22 young men have left Minnesota to join al-Shabab, including two who did so last summer. Unconfirmed reports that two more left earlier this month have deepened concerns.