The sidewalk has been closed nightly from 11 pm to 6 am since 2015 and will now be off-limits around the clock, the Secret Service said in a statement.
The closure will "lessen the possibility of individuals illegally accessing the White House grounds," Secret Service Communications Director Cathy Milhoan said.
In March, a man scaled a fence east of the White House at night and was on the property's grounds for 16 minutes before being detained. He never entered the White House, the Secret Service said.
President Donald Trump was inside the residence at the time of the March 10 incident.
The intrusion was the latest in a series of breaches at the White House in recent years. Security has been boosted, including the installation in 2015 of sharp spikes on top of the black iron fence that circles the 18-acre (7-hectare) property.
The same restrictions are in place on the north fence of the White House grounds, according to the Secret Service.
(Reporting by Eric Beech; Editing by Peter Cooney)
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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