The Brief Police say an inert grenade was thrown into a Philadelphia home overnight Wednesday. No injuries were reported after investigators say an inert grenade was thrown into a residence in Philadelphia overnight. What we know:Police were called to the 400 block of West Courtland Street just before 2 a.m. after a caller reported that a grenade had been thrown into their residence. Authorities later determined that the device was inert and posed no danger to the public. Police are urging anyone with information on the incident to reach out to the Philadelphia Police Department.