As reports of a shooting at a Sikh temple in Oak Creek, Wisc. surfaced on Sunday, a flood of worries and prayers emerged over Twitter.
Seven people have been confirmed dead by police, including a suspected gunman. A police officer was shot in the exchange of fire and is receiving medical attention.
Police continue to investigate, and are treating the killing as 'domestic terrorism.'
For live updates, read HuffPost's liveblog below.