Young woman dead, 3 people seriously hurt in Texas shootings; gunman on the loose

Latest: Officials in the US state of Texas say one woman in her 20s has died after a gunman opened fire in the capital, Austin.

Update 12 noon: Officials in the US state of Texas say one woman in her 20s has died after a gunman opened fire in the capital, Austin.

Three other people have been taken to hospital with gun shot wounds according to emergency services.