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Two 17-year-old suspects have been arrested and a third suspect is being sought in connection with the shooting outside Graham-Kapowsin High School that injured two 16-year-old students on Tuesday, authorities said.

The shooting in Graham followed a fight on school grounds, according to the Pierce County Sheriff’s Office.

One suspect was arrested at his home Tuesday night and a second was taken into custody early Wednesday after a green Chevy Impala, allegedly used by the fleeing suspects, was seen in Tacoma by police, said sheriff’s spokesman Ed Troyer.

Troyer said the Sheriff’s Office obtained a search warrant to enter the home where the second suspect was arrested.

Before the arrest Wednesday, the Sheriff’s Office had posted images of the two remaining suspects and the suspect vehicle on social media and said it needed help from the public identifying them.

“Please help us to share these images,” the law-enforcement agency said on its Facebook page. “We are confident that with your help we will bring swift justice and peace of mind for the hundreds of students and parents affected by today’s shooting. Help us to show that violence in and around our schools will not be tolerated by our community.”

The Pierce County Sheriff’s Office released video Tuesday of a green Chevy Impala that they say fled the scene of a shooting near Graham-Kapowsin High School. Authorities are seeking information about the car. (Pierce County Sheriff’s Office)

Detectives are seeking information on the third suspect wearing a dark jacket and turquoise hood.

Troyer told the (Tacoma) News Tribune that the first suspect arrested is a student at the high school but that the other two suspects are not believed to be from the area. The student suspect was arrested at his home hours after the 2:30 p.m. shooting, Troyer said.

The News Tribune reported that detectives said the shooting may be “gang related,” though it’s not clear what prompted the fight.

“We think there was some type of altercation between two groups and we’ll be sorting that out over the next few days,” Troyer said.

Both victims were listed in serious condition Tuesday but are expected to survive.

The Sheriff’s Office is asking anyone who recognizes the remaining suspects to call the Sheriff’s Office at 253-798-7530 or Crime Stoppers of Tacoma-Pierce County at 1-800-222-TIPS.