Assassination is the act of deliberately killing a prominent or important person, such as heads of state, heads of government, politicians, royalty, celebrities, journalists, or CEOs. An assassination may be prompted by political and military motives, or done for financial gain, to avenge a grievance, from a desire to acquire fame or notoriety, or because of a military, security, insurgent or secret police group's command to carry out the assassination. Acts of assassination have been performed since ancient times.