The rockets were launched on June 3 and 9 in the 7500 block of Pierce Street in Allendale Township. They were activated at about 7 p.m. both days.
Through remnants found at the scene, the Ottawa County Sheriff's Departments said it appears that the devices are made of 3-inch PVC and could have been up to
8 feet long. The rocket can ascend to several thousand feet at speeds of several hundred miles per hour.
The two devices that were recovered are believed to have malfunctioned and embedded several feet into the ground upon impact. The rockets are equipped with a parachute assembly and are propelled with an unknown fuel source.
They did not contain an independent explosive device, police said, and there were no reported injuries related to the launchings.
There are legal and legitimate launchings of these rockets under controlled and regulated circumstances. However, police said it is not believed that the launchings in these two events fit those requirements.
Anyone with information is asked to call Silent Observer at 877-88-SILENT.