The United Nations Security Council has unanimously adopted a resolution significantly expanding international sanctions against North Korea.
Correspondents say the new measures amount to some of the toughest against North Korea in two decades.
The vote is in response to North Korea's nuclear test last month.
The sanctions will result in all cargo going to and from the country being inspected, while 16 new individuals and 12 organisations have been blacklisted.
The sanctions also include a ban on all sales or transfers of small arms and light weapons to North Korea, and expulsion of diplomats from the North who engage in "illicit activities".