Sanctions against the Russian Federation will remain in force until Russia demonstrates changes in its behavior, U.S. National Security Advisor John Bolton has said.

As for the U.S. sanctions against Russia, the sanctions remain in force and will remain in force until Russia changes its behavior, he said at a press conference in Kyiv on Friday.

The U.S. presidential advisor noted that additional sanctions had been imposed over the past few weeks, some of them related to the DPRK regarding illegal trade. Also, according to him, some individuals of the Russian Federation are under sanctions in connection with the illegal use of chemical weapons in the UK.

Now we must conduct a 90-day review ... whether Russia has stopped its chemical program and whether it fulfilled the demands of international inspectors ... We are considering what should be done, what our obligations are," he said.

Bolton noted that sanctions are foreseen by U.S. laws and by-laws.