Four people have been killed and nine others injured in a shooting at Apalachee High School in the city of Winder, Georgia.

Officials have identified the deceased as students Mason Schermerhorn and Christian Angulo, and teachers Christina Irimie and Richard Aspinwall.

The 14-year-old suspect was arrested and will be prosecuted as an adult.

Here is what we know so far about the victims of the attack.

Mason Schermerhorn was one of two 14-year-olds who were killed. Friends of his mother told the New York Times that he had recently started at Apalachee.

He was described as light-hearted, and enjoyed reading, video games and visiting Walt Disney World.

Mason had an “upbeat attitude about everything”, Doug Kilburn told the newspaper.

Another friend, Louis Briscoe, described the moment he heard of the boy’s death from his mother, commenting: “Nobody should have to go through this type of pain.”

Before he was killed, Mason had texted his mother during the shooting to say that he was safe and sheltering inside a restroom, a chaplain who works with his mother told Fox News.

Lisette Angulo identified herself as the elder sister of the shooting’s other 14-year-old victim, Christian Angulo.

In a GoFundMe page aimed at raising money for the funeral, she said her brother was “a very good kid and very sweet and so caring”. She went on to say the boy was “loved by many”, describing her heartbreak at her loss.

Schoolmates remembered him as funny and with a “chill” attitude, Fox 5 Atlanta reported. One friend who said the two had been close since middle school said he was “in denial” after hearing about the deadly shooting.

Christina Irimie was one of two teachers killed in the shooting.

The 53-year-old is named on the Apalachee High School website as a maths teacher.

Students described her as patient and caring, Fox 5 Atlanta reported.

Ms Irimie was born in Romania and had come to the US more than two decades ago, a parish priest at a local Romanian Orthodox Church told the Atlanta Journal-Constitution newspaper.

Nicolae Clempus said she was someone “you know you can count on” and was a talented dancer who taught traditional Romanian dance to children.

“She definitely had a gift to work with young people,” the priest said.

A GoFundMe launched to support her family says Ms Irimie “dedicated her life to shaping the minds and hearts of students and the community”.

A second maths teacher, 39-year-old Richard Aspinwall, was also killed.

He was also the defensive coordinator for the school’s American football team. The head coach praised him as “a great dad, man and a great father”.

“He loved his two girls and he loved his wife,” said coach Mike Hancock. “He did happen to love the game of football and he was well respected around this area.”

He has also received tributes from his sporting peers.

Nearby Mountain View High School identified Mr Aspinwall as its former teacher and coach, saying its “thoughts and prayers” were with his family.

Brandon Gill, the football coach of nearby Buford High School, wrote on social media that Mr Aspinwall was a “helluva human being” who “would do anything for anyone.” He was an “amazing husband, father, teacher and coach”, he added.

A football game scheduled for this weekend has been postponed in the wake of the shooting.

As well as the four people who were killed, eight students and a teacher were wounded.

The teacher was identified by his daughter as David Phenix. He has a role in curriculum assistance, according to the school’s website.

His daughter said he underwent surgery after being shot in the hip, and that she felt “so, so lucky” he had survived.

Little has been revealed about the eight children who were injured.

Police say all those who were hurt in the attack are expected to recover.