Gunman checked for extremist links

Investigators in the US continue to focus on Major Nidal Malik Hasan as they look into the deadly shooting rampage at the Fort Hood military base in Texas.

Police have yet to determine a motive for Hasan's attack that left 13 dead and nearly 30 wounded. However, a key US senator wants an investigation to see whether he was involved with extremist groups.

Local newspapers report that Hasan's family held his mother's funeral at the same Virginia mosque that two of 911 hijackers attended in 2001. At that time, a radical imam preached at the mosque.