The United States has told India it is unlikely to get a waiver on its planned acquisition of Russian S-400 air defense systems, raising the risk of sanctions similar to those imposed on Turkey for buying that equipment, people familiar with the matter said.

The Trump administration has been telling the Indians to drop the $5.5 billion deal for five missile systems and avoid a diplomatic crisis, saying New Delhi did not have a wide waiver from a 2017 U.S. law aimed at deterring countries from buying Russian military hardware.

That position is unlikely to change under the Biden administration that takes over next week and that has promised an even tougher U.S. approach towards Russia, the people aware of the discussions said, speaking on condition of anonymity.