Only the United States has the clout to engage Israel and Iran in negotiations as the two countries continue to trade air attacks, Greek Prime Minister Kyriakos Mitsotakis has said, Reuters reports.

“Europe alone does not have the necessary influence to bring the parties concerned to the (negotiation) table. Only the United States can do that. So I think it is up to the President of the United States to decide which path to take,” Mitsotakis said in an interview on the sidelines of an energy conference in Athens.

The foreign ministers of Germany, France and Britain plan to hold nuclear talks with their Iranian counterpart on Friday in Geneva, a German diplomatic source told Reuters.

“We are all very concerned about any factor that will push inflation up and significantly disrupt energy markets,” Mitsotakis said.

He said Greece was also very worried about the safety of around 180 Greek-flagged and Greek-owned ships that sailed in the wider Persian Gulf region when Israel first attacked Iran last week.