GRAND RAPIDS, Mich. -- A helicopter has crashed atop Spectrum Hospital in downtown Grand Rapids, but only two people suffered minor injuries.

Lt. Ralph Mason told 24 Hour News 8 a pilot and a passenger, possibly an FAA official, were involved in the crash. But they managed to walk away with only minor injuries.

Floors 7-9 of the hospital were evacuated, and patients were taken from the Emergency Room.

Witnesses said they saw the helicopter wobbling around just before the crash. No information is known at this time about any injuries, or how many people are involved.

Police have closed the streets surrounding the hospital, including Michigan Avenue, and are asking people to avoid the area until further notice.