DUBAI (Reuters) – Iran has successfully tested a rocket that can deliver satellites into orbit, state television reported on Thursday, an event likely to raise tensions with the United States because of its potential use in a ballistic missile.

Washington has said Iran is defying a U.N. resolution calling on it not to undertake any activity related to ballistic missiles designed to be capable of delivering nuclear weapons. Tehran denies it has missiles designed to carry nuclear warheads.

“The Imam Khomeini Space Centre was officially opened with the successful test of the Simorgh (Phoenix) space launch vehicle,” state television said. “The Simorgh can place a satellite weighing up to 250 kg (550 pounds) in an orbit of 500 km (311 miles).”

State television showed footage of the firing of the rocket, mounted on a launch-pad carrying the pictures of Ayatollah Ruhollah Khomeini, founder of the Islamic Republic, and Supreme leader Ayatollah Ali Khamenei.

“The Imam Khomeini Space Centre … is a large complex that includes all stages of the preparation, launch, control and guidance of satellites,” state television added.

The United States this month slapped new economic sanctions on Iran over its ballistic missile programme, and said Tehran’s “malign activities” in the Middle East had undercut any “positive contributions” from a 2015 accord curbing its nuclear programme.

The measures signalled that President Donald Trump wanted to put more pressure on Iran while keeping in place the accord between Tehran and six world powers, which he has in the past condemned.

Iran says its space programme is peaceful, but Western experts suspect the programme may be a cover for developing military missile technologies.

On Monday, Scott Kripowicz of the directorate for international affairs at the Pentagon’s Missile Defense Agency told a conference in Israel: “Space-launch activities which involve multi-stage systems that further the development of technologies for intercontinental ballistic missiles (ICBM) are becoming a more realistic threat”.

“In this region, Iran has successfully orbited small satellites and announced plans to orbit a larger satellite using the Simorgh space-launch vehicle, which could be configured to be an ICBM,” Kripowicz said.

“Progress in Iran’s space programme could shorten the pathway to an ICBM, as space-launch vehicles use similar technologies, with the exception of their payloads,” he added.

On Saturday, Iran announced the opening of a new facility to produce a missile that can target fighter planes, unmanned aerial vehicles, cruise missiles and helicopters.

In 2013, Iran said it had successfully launched a monkey into space and retrieved it alive, which officials hailed as a major step towards their goal of sending humans into space.

But in March, an official said the state-run space agency had cancelled a project to launch a human into space because of high costs.