The two people killed when a Kansas mom allegedly drove her pickup truck onto youth soccer fields at Stryker Sports Complex have been identified, as police released the driver from custody. 

Cole Adrian, six, and Nicholas Schafer, 35, were identified on Sunday as the victims killed during Saturday's incident that also injured at least 10 others, including other children. 

The driver, only identified as a 34-year-old mother from Garden City, allegedly shouted, 'Oh my God, oh my God, what have I done?' when pulled from the vehicle by bystanders at the event, according to the New York Post. 

One of the driver's children was in the back of the Chevrolet pickup truck at the time of the incident, and her other child had been playing in a game on a different field. 

Other parents and bystanders attempted 'life-saving assistance' to those injured during the incident, Wichita Police Department Chief Joe Sullivan said. 

'It was truly amazing, but I think it’s indicative of the Wichita community,' he said. 

She was released without charges on Sunday afternoon pending a toxicology test and a mechanical examination of the vehicle, according to police.

'No charges have been filed at this time, and investigators continue working to determine the circumstances that led to the crash,' law enforcement said. 

The victims, both McPherson natives who police said were not related, were pronounced dead at the scene, while those injured were rushed to hospital in critical condition.

Among those left with traumatic injuries included two five-year-olds, a girl and boy, and a nine-year-old girl. The rest of those hurt are aged between 28 and 68 years old.

Police Captain Aaron Moses noted that one of the driver's children was in the back of the Chevrolet pickup truck at the time of the incident, and her other child had been playing in a game on a different field, the Post reported. 

The driver, a Garden City, Kansas, native, remained at the scene and was subsequently taken into custody. 

Authorities have not revealed whether they believe the deadly incident was deliberate or accidental.

'At about 3:25pm Sedgwick County emergency communications began receiving multiple emergency calls reporting that a vehicle had driven through a soccer game at Stryker soccer complex,' Moses said to KWCH.

'Our officers along with law-enforcement from the area, Wichita Fire Department and Sedgwick County EMS responded to the scene.

'We have two fatalities confirmed here at the scene and multiple other casualties with individuals transported to area hospitals.

'The vehicle involved in this incident remained at the scene. The driver of that vehicle is currently in our custody. There is no additional ongoing threat to the public from that driver.'

Moses said he did not know how fast the truck was going or how it managed to get on to the field. He said police had managed to interview more than 30 witnesses in an effort to establish exactly what happened.

A witness told local television station 12 News that a 'black pickup truck came plowing through the youth soccer fields hitting multiple people before stopping 100-200 yards down the fields.'

The witness described harrowing scenes as emergency responders rushed to help those struck by the vehicle.

'Dozens of emergency responders on scene giving CPR and rendering aid to victims,' the witness said.

The account suggested the truck had traveled a considerable distance across the sports fields before finally coming to a stop.

Police are appealing for anyone with video footage of the incident to share it with them. 

'Regardless of how significant you believe your footage may be, we encourage you to submit it. Even the smallest detail could assist investigators,' said the WPD. 

Wichita Mayor Lily Wu said she's 'heartbroken' and advised people to avoid the area, adding, 'My thoughts and prayers are with everyone affected, especially the children and families involved.'

The tragedy unfolded at a venue popular with young soccer players and their families, turning what should have been an ordinary Saturday afternoon of sport into an emergency.

The Kansas State High School Activities Association (KSHSAA) said play has been suspended for the flag football state championship following the deadly accident.

'Games will not resume this weekend, but a later announcement will be made with updated game times,' KSHSAA said.

The association extended its condolences to the 'families and teams impacted by the incident on a field adjacent to the flag football competition at Stryker Sports Complex Saturday.'

'Given the nature of the emergency, we felt it was best to suspend the flag football third place and championship games until a later date. Details will be announced Monday,' KSHSAA said.

Stryker Sports Complex in northeast Wichita, is a major regional soccer facility that hosts youth competitions and other sporting events.

Its extensive playing fields regularly attract young athletes, coaches and spectators from across the region.

The fact that the vehicle appeared to drive directly through a soccer game has raised urgent questions about how it came to enter the playing area.