Iran's foreign minister says if the U.S. Congress votes for more sanctions against his country, it will kill a nuclear deal with the West.

Javad Zarif warned Iran's parliament will retaliate if U.S. lawmakers approve fresh sanctions — even if President Barack Obama vetoes them.

But Zarif said there's "a very good probability" that a comprehensive deal over Iran's disputed nuclear program can be reached soon. More such negotiations are planned in Switzerland this weekend.

Zarif spoke in an Associated Press debate Friday at the World Economic Forum in Davos.

He disputed assertions by Germany's defense minister, Ursula von der Leyen, that sanctions were key in forcing Iran to the negotiating table, saying the country's driving force was a desire to "change our dynamics" with the rest of the world.