Caracas helicopter incident
On 27 June 2017, there was an incident involving a police helicopter at the Supreme Tribunal of Justice (TSJ) and Interior Ministry in Caracas, Venezuela. Claiming to be a part of an anti-government coalition of military, police and civilians, the occupants of the helicopter launched several grenades and fired at the building, although no one was injured or killed.
Source: Wikipedia — Caracas helicopter incident (CC BY-SA 4.0)