PANAMA CITY, May 29 (Reuters) - A helicopter crashed into a building in a busy central district of Panama City on Thursday, killing several people, officials and emergency workers said.

Panama City Mayor Juan Carlos Navarro said two senior Chilean military personnel visiting Panama for an anti-terrorism conference were in the helicopter, and said that at least one of them was dead.

Emergency workers said there could be several more dead, either more passengers or people in the building, which houses a store. A Reuters reporter at the scene saw body parts on the ground as the building blazed. The back end of the helicopter was torn off in the crash and landed on a nearby office building.

The cause of the crash was not immediately clear. (Reporting by Andrew Beatty; Writing by Mica Rosenberg, Editing by Sandra Maler)

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