The FBI is searching for a third adult gunman in connection with the Kansas City Chiefs parade shooting that left one person dead and more than 30 others injured, DailyMail.com can reveal.

Two new adult suspects, Lyndell Mays, 22 or 23, and Dominic Miller, 18 or 19, were both charged with second-degree murder, armed criminal action and unlawful use of a weapon on Tuesday.

These men are not the two juveniles that had been charged with gun-related offenses and resisting arrest last week.

Eyewitnesses have come forward with new details of a potential third shooting suspect who they claim they saw holding a gun moments after Lisa Lopez-Galvan, 44, was shot dead at the scene on February 14.

Investigators are now are working to identify him so they can take him in for questioning.

Two suspects have been arrested and charged so far, and it has since been confirmed that a man, identified as Denton Loudermill – who was photographed in handcuffs in the immediate aftermath of the shooting – was not involved in the violence.

But one eyewitness, who asked to remain anonymous, has now recalled seeing another individual wielding a weapon in the crowd as terrified parade-goers unsuccessfully tried to save Lopez-Galvan’s life.

He told DailyMail.com: ‘My daughter and I were visiting family in Kansas, and she’s a huge Chiefs fan so we went to the parade – it was her first time ever going to something like that.

‘A fight breaks out around five to ten feet from us, and I didn’t realize it at the time because I just thought they were all little punks. One of the shooters had to be around 13.

‘The guy had the gun at his hip, and was shooting from the hip into the crowd. The first victim, the lady who died, she was shot in the leg, and they just carried on shooting.

‘As we’re moving, there was a guy to my right, his chest exploded, and there were bodies just piling up around me.

‘Two cops then got between the gunman and the woman who was shot in the leg, they were really heroic, trying to protect her. The shooters had pistols and one had an AK-47 with a banana clip and collapsible stock.

‘This guy was about four feet from me with his gun out and I just wanted to find my daughter. She was trampled in the crowds but she’s okay’.

Investigators are yet to confirm the identity of any of the alleged marksmen, with sources telling DailyMail.com that the two teenagers who have been charged are refusing to help with the investigation.

The witness, a software engineer who lives in Florida, said that he was hit in the face with Lopez-Galvan’s shoe as she was shot and he believes he saw four gunmen running around with weapons.

He said he had gone to sit down as the parade was about to end, before hearing several gunshots – which some thought were fireworks.

‘My son asked if it was fireworks, after hearing several pops,’ he said. ‘And I said no it’s a mass shooter.

‘The gunmen were still walking around with their guns out even after they shot and killed that woman.

‘They were just juveniles having a fight, and then they pull out guns and start shooting everyone.

‘I don’t know if the fight was a ploy.’

The witness added that he wanted to stress that the Chiefs players had fled after the shooting, saying: ‘The players were not there and they’re saying they sheltered kids but they didn’t.

‘It’s horrible, they’re trying to make the most of their frickin PR.’

The comments come after the team’s main stars, tight end Travis Kelce, 34, and quarterback Patrick Mahomes, 28, were hit with a backlash after they attended a ‘scaled down’ party to celebrate their Super Bowl win in the aftermath of the shooting – before an update had been given on the conditions of those shot.

Kelce has since donated $100,000 to one of the victims, matching his girlfriend Taylor Swift’s gift. But that move only came after he took waves of criticism for partying and posing for a smiling selfie with a police officer in the wake of the deadly shooting.

He was seen beaming at Granfalloon Restaurant and Bar on Wednesday in a snap obtained exclusively by DailyMail.com alongside several teammates and their partners – including Mahomes and his wife Brittany.

Kelce was part of a small group at the sports bar which also included Chiefs punter Tommy Townsend, center Creed Humphrey, and tight end Matt Bushman and his wife Emily.

Lopez-Galvan, 43, was shot and killed in the incident which started as a ‘dispute’ between a group of two youths, according to investigators.

Witnesses also claim that there was only one police officer guarding those who were arrested, as their guns were left on the ground.

Sources added that police ‘knew’ there was a third shooter from footage and witness accounts and have been desperately trying to identify the suspect to apprehend them.

The FBI and Kansas City Police are still searching for the unidentified suspect, and are calling for witnesses, victims, and people with cellphone video of the violence to call a dedicated hotline.

Initially three teens were arrested, but one was released after being ruled out of their enquiries.

Two juveniles were charged on Friday in connection with the killing, but Missouri law means their hearing was held in private and no further details have been made public.

The pair appeared in Jackson County Family Court on gun-related charges as well as resisting arrest.

Authorities are expecting more charges against the teens which could see them tried as adults.

If they are convicted of first-degree murder they could receive the death penalty, according to Jackson County Court, so long as they were 16 at the time the offense was committed.

All the patients who were admitted to Children’s Mercy Hospital following the mass shooting have been discharged, with medics treating 12 patients.

Mahomes and his wife Brittany were pictured last week visiting two young sisters in hospital after the girls, aged eight and ten, were shot in the legs.

In total at least 39 people were wounded with 23 suffering from gunshot injuries – including nine children.

The victims’ range between eight and 47, with the hospital confirming that the children should make a full recovery.

University Health said three shooting victims are still in the hospital’s care, with one remaining in critical condition while the other two are improving.

In total they treated eight patients with gunshot wounds and four with other injuries related to the rally.