False flag attack

Operation under a fake flag or fake flag (English false flag operation or false flag), eventually foreign flag operations is a secret operation led by a government, corporation, or other organization that is designed to appear to be done by someone else. The name is derived from a 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]