N.D. Cent. Code § 29-06-17: Officer shall state authority when arresting without warrant

When making an arrest without a warrant, the officer shall inform the person to be arrested of the officer's authority and the cause of the arrest, unless:

1.The person to be arrested then is engaged in the commission of an offense;

2.Such person is pursued immediately after the commission of an offense or after an escape;

3.Such person flees or forcibly resists before the officer has opportunity so to inform the person; or

4.The giving of such information will imperil the arrest.