At least two people have been shot at Taft Union high school in southern Californian, according to local media reports.
The suspected shooter has been taken into custody, according to local radio station KERO. Early reports indicate that one victim was airlifted to hospital.
Students were evacuated to the football field, whilst Kern County Sheriff's officials went room-to-room to secure the campus, according to reports.
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Matalan said: "It is with great sadness we can confirm...both victims worked at our Cardiff branch."
Police believe a tree currently growing near the farmhouse where the 21-month-old toddler was last seen in 1991 was not there at the time.
The 21-year-old was using a portable toilet in Sydney when he was bitten near to the same area as in a previous incident in April.