Joint Base Andrews in Maryland, the home of the presidential jet known as Air Force One, experienced a concerning security incident this week.

Part of the base was evacuated, and several individuals received medical treatment, after a "suspicious package" containing an unidentified "white powder" was opened on Thursday, according to Newsmax.

First responders, including a hazardous materials team, swiftly investigated the incident but eventually gave the all-clear, and normal operations for the military base were resumed shortly thereafter.

"Suspicious package" with "unknown white powder" discovered

CNN was the first to report that at least seven individuals felt "ill" and received treatment at the medical center on Joint Base Andrews after one individual "opened a suspicious package" and discovered an "unknown white powder," per multiple unnamed sources.

"As a precaution, the building and connecting building were evacuated, and a cordon was established around the area," a spokesperson for the base said in a statement. "Joint Base Andrews first responders were dispatched to the scene, determined there were no immediate threats, and have turned the scene over to Office of Special Investigations. An investigation is currently ongoing."

One source told the outlet that the hazmat team did not find anything of concern and soon departed the scene, though the investigation of the incident remains ongoing. One item of interest for investigators will be some undescribed "political propaganda" discovered in the package.

The evacuated building where the package was opened, which houses the Air National Guard Readiness Center, was still closed at the time of the report, while all of the individuals taken to the medical center were treated and released.

Package contents featured "negative sentiment" toward Trump

Axios later reported that, according to a statement from the 316th Wing of the U.S. Air Force, the "political propaganda" initially reported on by CNN was described as featuring "negative sentiments" toward President Trump, though not any "specific threats" to his safety or well-being.

"There were no specific threats towards the President or other government officials," the statement said. Yet, as a precaution, "emergency responders evacuated the building and connecting building and established a cordon around the area."

The statement added, "Seven individuals felt ill and were assessed by the JB Andrews medical team and were released. Joint Base Andrews first responders were immediately dispatched to the scene."

As for the "unknown white powder" that was reportedly found, an assessment for "multiple contaminants" conducted by the Bioenvironmental Engineering, Emergency Management, Fire Department, and Explosive Ordnance Disposal team uncovered no actual powder or hazardous material.

Trump targeted by those who wish him harm

Given the fact that Joint Base Andrews is the home of Air Force One, and as such is frequently visited by President Trump and other top White House officials, the concern over the suspicious package and subsequent evacuation and investigation appears to be justified.

There have already been multiple attempts made to assassinate Trump, and his legion of haters and political opponents have shown repeatedly that they will identify and exploit any opportunity to cause him harm.

Thankfully, this incident seems to have been a false alarm, and, hopefully, any lessons learned by investigators about potential weak points in the security protocols will be swiftly applied to continue to keep the president and everyone else around him safe.