US Secretary of State Marco Rubio has warned that economic pressure on Iran will continue to intensify, saying the impact of sanctions is becoming increasingly severe.

Axar.az reports that Rubio made the remarks while speaking to reporters in Paris following two days of meetings with G7 allies.

"The economic pain that is being inflicted on Iran right now and on that regime is extraordinary, and it compounds. It's growing every day," Rubio said.

He stressed that sanctions would become increasingly painful over time, adding: "These sanctions, they get worse over time. They get more painful as time goes on."

"The economic pressure is going to get even worse," he added.

Rubio also noted that Iran had only a small number of oil barrels remaining in transit that had managed to pass through the blockade during the brief ceasefire period.

"Once that dries up, almost all of their oil revenue will dry up," the US secretary of state said.