May 31, 2017, 17:20
The school is around 25 minutes from the embassy but many American citizens have children studying there.
The incident happened on Wednesday morning, when no students were present, the US embassy in Riyadh said on Twitter.
There are now no children at the school but admin staff were said to be in the building when the gunman opened fire. According to Associated Press, no children were present during the incident.
The school was expected to issue a statement later Wednesday. The holiday began on Saturday.
The Saudi Interior Ministry did not immediately respond to a request for comment.
Opened in 2000, the school is owned and operated by Kingdom Holdings, which belongs to Saudi billionaire Prince Alwaleed bin Talal.
Maiman said the school's private security guards followed established procedures until the case was handed over to government authorities.
Residents have been warned to avoid the area surrounding Kingdom School in Riyadh.
The embassy did not mention if there were casualties.
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