The Associated Press
Lt. Gen. Lloyd Austin says the number of weapons found on the battlefield has decreased thanks to better Iraqi control of the borders and U.S.-Iraqi military operations.
He says "those activities have paid great dividends."
But he says American forces have found recently made rockets and mortars in Iraq and "that leads us to believe that support activity is still ongoing."
He also told reporters Wednesday that some extremists who fled to Iran have returned and been captured.
Tehran denies that it supports violence in Iraq, saying it wants its neighbor to be stable.