At least three people were stabbed Thursday when a man allegedly attacked individuals at a blood plasma donation center in Petersburg, Va.

Police told the Richmond Times-Dispatch that several people were injured with a "cutting instrument" before the suspect was taken into custody.

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Three victims -- two women and one man -- were taken to the hospital for treatment of various injuries, according to the newspaper.

The Associated Press later reported that Petersburg police Lt. Dustin Sloan said the victims were in stable condition.

A recording of a call to a police dispatcher when the attack began indicated that the suspect was using a machete, and that one victim had lost a finger.

“The suspect possibly has a machete. Units use caution,” the dispatcher is heard saying, according to the AP.

The suspect was identified by Commonwealth Attorney Cheryl Wilson as 20-year-old Jairique Shannon of Virginia, according to the AP.

Shannon reportedly had donated plasma at the center before, and the center was hosting a Fourth of July cookout at the time of the attack.

No details on the motive for the attack were initially available.

“There’s no information that he had any grudge against anyone, and at this point we don’t have a motive,” a state attorney said.