(CNN) --
At least two people were shot Friday afternoon in Northwest Washington and authorities are responding to an "active threat" in the area.
The Washington Metropolitan Police Department said the incident took place in the 4100 block of Connecticut Avenue and "there is a large police presence in the area."
The Bureau of Alcohol, Tobacco, Firearms and Explosives, as well as the US Secret Service, are helping with the response.
Anthony Guglielmi, a spokesman for the Secret Service, says there is "no impact" on any protégés.
The situation is being characterized as an "active threat" and residents are being asked to shelter in place or avoid the area.
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