A park maintenance worker came upon a suspicious looking device in a playing field north of Morrow Drive early on the morning of October 1st and notified the Park Police. The responding officer determined that it could be a hand grenade. A perimeter was established and nearby residents were directed to evacuate the area. The Metropolitan Police explosive ordnance unit responded, examined the device, and determined that it was in fact a grenade. They contacted a military explosive ordnance unit and asked for assistance. The grenade was recovered, rendered safe, and found to be real but without any explosives inside. It was turned over to the Park Police. The surrounding area was checked and the scene was cleared. The incident is currently under investigation.