False flag attack

Operation under a fake flag or fake flag (English false flag operation or false flag), eventually foreign flag operations is a covert operation conducted by a government, corporation, or other organization that is designed to appear to be performed by someone else. The name is derived from the military concept flying false color, ie the operation performed in other (national) colors than those with the national flag. On the other hand, operations under a fake flag are not confined to military confrontation and can take place in civilian and peacetime, eg in intelligence operations. [Source: Wiki]