The United States will announce new sanctions on Iran Monday. This follows messages exchanged between Washington and Tehran.

Reports on Saturday said the sanctions could affect Iran. They could also affect major trading partners like China.

President Trump called the campaign unprecedented. He said it aims to pressure Iran over its nuclear program.

Trump also wants to reopen the Strait of Hormuz. Iran's president made a claim about the conflict.

He said the world now accepts Iran won. The Strait of Hormuz is a key waterway for oil ships.

On Saturday Iran let several Iraqi oil tankers pass through the strait. This followed repeated requests from Iraq.

Iraq has been badly hurt by the disruption. Iraq is now looking for other ways to export oil.

Traffic through the strait remains far below normal levels. The conflict between Iran and the United States is nearing six months.