One suspect is in custody after a stabbing left several people injured at a plasma center in Petersburg, Virginia, officials said. Police chief Kenneth Miller said the stabbing happened inside the Octapharma Plasma center, CBS Richmond affiliate WTVR reported.

The suspect used a "cutting instrument" to injure the victims shortly after 4:40 p.m., according to officials.

Detectives are interviewing several people at the scene and continuing to investigate the incident. Medical officials told WTVR that three people were transported to a nearby hospital, two of whom are in fair-to-good condition. One male patient, who was in critical condition, was transferred to another hospital.

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People leaving the plasma center who appeared to work there said they couldn't discuss the incident with WTVR due to company policy.