The White House is adding new "pencil point" spikes to the top of the security fence in a short-term attempt to thwart intrusions. (Reuters)

Spikes will be installed on the White House fence starting Wednesday as a temporary measure designed to enhance security and help stop intruders from entering the grounds.

What the National Park Service and Secret Service described Tuesday as a “removable anti-climb feature’’ consisting of sharp metal points will be placed atop the fence.

The two agencies said in a joint statement that they are working with other government agencies to develop a long-range design solution for the fence.

Last September a man climbed the fence and penetrated deep into the White House before being stopped. The episode raised security concerns and led to a shakeup in the leadership of the Secret Service.