A construction site cave-in four blocks from the White House was stabilized early Wednesday as utility crews worked to restore telephone and electrical services.

A 100-foot-long section of sidewalk and part of a downtown street slid into the 4-story-deep hole Tuesday as workers tried to shore up the construction site from the initial collapse Monday night. No injuries were reported.Workers at United Press International were allowed back in their headquarters Wednesday, but telephone company spokesman Michel Daley said full service would not be restored until later in the day. The news agency abandoned its headquarters adjacent to the scene of the collapse Monday night, but the news service continued to operate with help from a rival agency, Reuters, and from National Public Radio.

Even though the site was stabilized, more dirt will be dumped, according to Vincent Ford, District of Columbia chief building inspector. Ford said he did not expect any further ground movement.