Mass Shooting at Fort Hood

Horrific events unfolding. 

Seven people have been killed and 20 others injured in a pair of shootings at the Fort Hood military base in Texas, the US Army has confirmed.

One person has been arrested and at least one more is on the run, reports say. The base has been locked down.

NBC News network said the two suspects were in military uniform and that the shooter-at-large was believed to have a high-powered sniper rifle.

Fort Hood, near the town of Killeen, is the largest US military base.

Home to about 40,000 US troops, the base lies between Austin and Waco, about 60 miles (97 km) from each city.