Washington: A small helicopter landed on the west lawn of the US Capitol, and a single occupant aboard has been detained, US Capitol Police said.

"The US Capitol Police is investigating a gyro copter with a single occupant that has landed on the grassy area of the West Lawn of the US Capitol," Capitol Police spokesperson Kimberly Schneider said on Wednesday. "The US Capitol Police continues to investigate with one person detained and temporary street closures in the immediate area."