A United Nations agency under fire for shipments of computers and other equipment to North Korea and Iran announced internal changes this week in response to withering criticism -- but Capitol Hill lawmakers said the changes fall "far short" of what's needed. 

The World Intellectual Property Organization, or WIPO, which made the shipments over the course of the last year, detailed the changes in a statement Thursday. The agency announced it would refer the matter to U.N. sanctions committees, consult those committees on any future shipments to sanctioned countries and stop providing "IT hardware" altogether. 

Amid tough calls from the U.S. for an independent probe, the agency also announced that "initial steps" are being taken for a "full external and independent review" of assistance to sanctioned countries. 

Not good enough, said the top lawmakers on the U.S. House Foreign Affairs Committee.