Two men have been arrested and charged in the connection with the alleged assault of US Capitol Police Officer Brian Sicknick.

As reported by NBC News, Julian Elie Khater, 32, of Pennsylvania, and George Pierre Tanios, 39 of West Virginia, were taken into police custody on Sunday, with authorities accusing the men of using bear spray during the January 6 attack of the US Capitol.

Sicknick died the day after the January 6 riots, with his cause of death yet to be determined.

Per The Independent, arrest documents cite that the two were charged with nine counts of assault on multiple officers, plus civil disorder and obstructing a Congressional proceeding.

Both men were reportedly identified by tipsters thanks to surveillance footage images.

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According to reports, in one video captured at the Lower West Terrace of the Capitol at 2:14PM, Khater can allegedly be heard telling Tanios: "Give me that bear s***."

Per The Independent, the video then allegedly shows Khater discharging a canister into the face of Officer Sicknick, and two other officers approximately nine minutes later.

FBI Special Agent Riley Palmertree wrote in a criminal complaint that the pair could be seen in videos "working together to assault law enforcement officers with an unknown chemical substance by spraying officers directly in the face and eyes."

"Many of the federal police officers were injured and several were admitted to the hospital," Palmertree wrote of the Jan. 6 mayhem.

"The subjects also confronted and terrorized members of Congress, Congressional staff, and the media. The subjects carried weapons including tire irons, sledgehammers, bear spray, and tasers."

Arrest documents reportedly state that the two men grew up together in New Jersey. Khater now reportedly works in State College Pennsylvania and Tanios owns a business in Morgantown.

Investigators are still reportedly attempTing to determine how Mr Sicknick died.

On February 26, US Capitol Police said in a statement that the medical examiner's report was not yet complete, and they were still "awaiting toxicology results".

Whether or not anyone is criminally charged in connection with Sicknick's death will depend on if investigators are able connect the cause to a specific event.

Despite several previous reports circulating stating that Sicknick was struck with a fire extinguisher, the officer's mother later told the MailOnline that this is false.

Gladys Sicknick said: "He wasn’t hit on the head no. We think he had a stroke, but we don’t know anything for sure. We’d love to know what happened."

Two men charged with assault in attack on Capitol police officer who died a day later