Last month, the EU expanded its sanctions blacklist after North Korea launched a volley of surface-to-ship cruise missiles off its east coast.
The EU's external affairs arm said in a statement that the bloc expected North Korea to abide by UN resolutions and halt all work on its nuclear and missile programmes.
The European Union "will consider an appropriate response, in close consultation with key partners and in line with UN Security Council deliberations, including possible additional restrictive measures," it said.
In an unusual joint statement earlier, Russia and China condemned the missile test as "unacceptable" and urged against "any statements or actions that could lead to an increase in tensions."
EU sanctions against North Korea date back to 2006 and are part of international efforts to halt a nuclear and ballistic missile programme which experts say is intended to give Pyongyang the capability to hit the US mainland.