Dubai: Iran will help oppressed people in the region, Supreme Leader Ayatollah Ali Khamenei said on Saturday, days after Gulf Arab leaders met US President Barack Obama and expressed concern about Iranian expansionism.

Khamenei also denounced Saudi Arabia for its role leading a coalition of Sunni-ruled Arab states against Yemen’s Al Houthi militiamen.

His speech to a meeting of Iranian leaders and diplomats from the Muslim world, reported by the state news agency IRNA, brought the issues of political and religious legitimacy squarely into the struggle between the two regional powers.

“Yemen, Bahrain and Palestine are oppressed, and we protect oppressed people as much as we can,” IRNA quoted him as saying.

Gulf Arab leaders met with Obama on Thursday to express their concern that Iran is trying to expand its influence in the region aggressively, parallel to nuclear negotiations under way with world powers.

The US backs the Saudi-led Sunni coalition waging the military campaign against Al Houthi militiamen. Riyadh has accused Tehran of arming Al Houthis and the US said that there has been evidence of this.

The standoff has raised concerns for shipping in the Gulf, a transit route for millions of barrels of oil per day. In the past month, Iranian forces have twice tried to seize commercial ships to settle legal disputes.

“Security in the Gulf is in the interests of everyone... If it is insecure, it will be insecure for all,” Khamenei said, indicating Iran’s apparent willingness to cause disruption if attacked.

Tensions have also reached the Gulf of Aden, another crucial choke point for oil shipments, after Iran on Monday dispatched a cargo ship towards Yemen under military escort.

Forces from the Saudi-led coalition have imposed inspections on all vessels entering Yemeni waters, raising the potential for a standoff with the Iranian flotilla which is due to arrive in the coming days.