Washington  - A pilot flying a small plane violated the tight airspace regulations around Washington, prompting orders to briefly evacuate Congress and parts of the White House, media reports said.

The US Senate adjourned into a quick recess but returned to session minutes later after the all-clear signal was given. MSNBC television reported that the pilot complied with demands to alter course.

People at the White House's north lawn were told to get inside by the Secret Service. Extra precautions to protect the airspace around Washington were enacted following the September 11, 2001, terrorist attacks.(dpa)