Minn. Stat. § 629.35: ARREST AT NIGHT; WHEN PERMISSIBLE.

A peace officer may arrest a person at night without a warrant if the officer has reasonable cause to believe that person has committed a felony. An arrest under this section is lawful even if it appears after the arrest that no felony has been committed. When arresting a person at night without a warrant, a peace officer shall inform that person of the officer's authority and the cause of the arrest. This warning need not be given if the person is apprehended while committing a public offense or is pursued immediately after escape.