(CNN) — A suspicious package was delivered to a US military base in Maryland on Thursday which caused multiple people to fall ill and be taken to the hospital, CNN has learned.

A statement from Joint Base Andrews, which is located outside Washington, DC, said that a building on the base was evacuated after an individual “opened a suspicious package.”

“As a precaution, the building and connecting building were evacuated, and a cordon was established around the area,” the statement said. “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.”

Several people were transported to the on-base Malcolm Grove Medical Center after the

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