The United States and its Gulf partners are looking to deepen cooperation on missile defense as tensions rise with Iran, and announcements could come soon on new purchases, according to US officials.

Secretary of State Hillary Clinton met the officials from Gulf Cooperation Council (GCC) in New York as Washington seeks to boost regional defenses against perceived Iranian threats.

"Our aim is to help our Gulf partners with their defense needs ... there is a missile threat that they face, we want to help them face that threat as best they can," one senior US official said on Friday, previewing the meeting for reporters.

"We've had expressions of interest from our partners in the Gulf in additional missile defense capabilities," the official said. "We hope that we will be having announcements in the near future regarding those expressions of interest."

The official declined to provide specifics on the plans with the GCC. But Lockheed Martin, the Pentagon's top supplier by sales, received an initial $1.96 billion contract in December for two of its Terminal High-Altitude Area Defense (THAAD) weapon systems from the UAE, the first foreign sale of the system.

Lockheed has said other GCC members, including Saudi, have expressed interest. The other leading missile-defense contractors include Boeing, Raytheon and Northrop Grumman.

Friday's talks reflect the increased tempo of US efforts to put pressure on Tehran over its nuclear plan.

The US has been working with Gulf states on a bilateral basis, not as a group, to boost the range of radar coverage and related capabilities across the Gulf for the earliest possible defence against any missiles fired by Iran.

The Pentagon said Defence Secretary Leon Panetta, who had planned to attend Friday's meeting along with White House Security Adviser Tom Donilon, was unable to make it due to bad weather in New York.

US officials said the ultimate goal is a regional shield that can be coordinated with US systems - parallel with Washington's drive to expand missile defense to protect Nato's European territory against ballistic missiles that could be fired by Iran.

The officials said expanded security co-operation with the Gulf is already bearing fruit and pointed to recent joint anti-mining exercises by the navies of 12 countries.

Iran has threatened to target US interests in the Gulf, including military bases, and to block vital oil tanker routes in the Strait of Hormuz if it is attacked.

Plans for a joint missile shield in the Gulf have been on the table for some time, but progress has been slow due to unease among some GCC members about sharing data and where such a system would be commanded.

Individual Gulf states have acquired some advanced defense systems, including the latest versions of the Patriot Air and Missile Defense System. The UAE has spent billions of dollars in recent years to protect its cities and oil infrastructure from missile attack.-Reuters