A community is facing an unimaginable tragedy after a shocking incident unfolded at an elementary school in Bend, Oregon. A teenage gunman opened fire in the city of Bend, killing four people and leaving two more in critical condition, before he was shot and killed by a bystanderA 16-year-old gunman opened fire at the Silver Rail elementary school in Bend, Oregon, authorities said on Thursday, killing three children and a teacher.The student victims are aged five, eight and 11. Key points and original sources are listed below.

• A community is facing an unimaginable tragedy after a shocking incident unfolded at an elementary school in Bend, Oregon. As authorities work to piece together what happened and account for those impacted, heartbreaking details are emerging about the lives los...S1

• A teenage gunman opened fire in the city of Bend, killing four people and leaving two more in critical condition, before he was shot and killed by a bystanderA 16-year-old gunman opened fire at the Silver Rail elementary school in Bend, Oregon, authorities sai...S2

• A 16-year-old opened fire at an elementary school in Bend, Oregon, on Thursday, killing three children and a teacher before he was shot by a person at the scene who pursued him into the school, authorities said. Authorities found the suspect dead inside the sc...S3

• Multiple victims have been reported after a shooting at Silver Rail Elementary School in Bend, Oregon. Bend-La Pine Schools Superintendent Steven Cook said in a statement that the district is "stunned and heartbroken by this senseless tragedy."S4