single shooter and that shooter it appears has been shot and killed. it still remains an active shooting scene as the search continues for any other possible shooters. according to the officials as many as eight people were wounded and it's believed that four of them have been -- are in grave or critical condition as a result of this shooting. again, the search continues on the base because it is not clear whether there were others involved. no motive, no identification of the shooting as of yet. although there was some discussion among military officials about the possibility that this was another sort of jihadist attack as we have seen in 2009 when army major nidal hasan opened fire at the base killing 13 and wounding 32. he since has been convicted and is awaiting his death sentence on death row in military custody. so that's the latest we have