London mayor Boris Johnson confirmed that the crane hit by a helicopter this morning "is now secure".
Speaking to reporters in south London, Mr Johnson described the response of the capital's emergency services as "immensely reassuring".
He said questions about air traffic in the area and the use of the Battersea heliport are "matters that are now being investigated by the Civil Aviation Authority".
Two men were killed after a helicopter collided with a high-rise crane in London and plunged more than 700 ft to the streets below.
The pilot of the helicopter which crashed had thousands of hours of flying experience including for films such as Die Another Day.