Rome: An international coalition is pushing back IS militants in their Syrian and Iraqi strongholds but the group is threatening Libya and could seize the nation's oil wealth, US Secretary of State John Kerry said on Tuesday.
Officials from 23 countries are in Rome to review the fight against IS militants, who have created a self-proclaimed Caliphate across swathes of Syria and Iraq, and are spreading into other countries, notably Libya.
IS forces have attacked Libya's oil infrastructure and established a foothold in the city of Sirte, exploiting a power vacuum in the North African country where two rival governments have been battling for supremacy.
"In Libya, we are on the brink of getting a government of national unity," Kerry told the Rome conference. "That country has resources. The last thing in the world you want is a false caliphate with access to billions of dollars of oil revenue."
Under a UN-backed plan for a political transition, Libya's two warring administrations are expected to form a unity government, but a month after the deal was agreed in Morocco, its implementation has been dogged by in-fighting.
The United States is leading two different coalitions carrying out air strikes in Iraq and Syria that have targeted IS.
Western nations are also considering hitting the militants in Libya, a gateway for tens of thousands of migrants hoping to reach Europe. However, they want a green light from the planned unity government before acting.
"We are still not at the victory that we want to achieve, and will achieve, in either Syria or Iraq and we have seen IS playing a game of metastasizing out to other countries, particularly Libya," Kerry said.
However, he said the anti-IS group had made marked progress since it last met in June 2015. "At the time of out last ministerial, Ramadi had just fallen and there was a pretty dark and dangerous narrative that was emerging," he said.
He said that Iraqi forces had since retaken the city and IS had since lost about 40 per cent of its territory in Iraq and 20 per cent in Syria.
The one-day Rome meeting takes place as talks have begun in Geneva to try to end the five-year-old Syrian civil war, which has killed at least 250,000 people, driven more than 10 million from their homes and drawn in the United States and Russia on opposite sides.
While Washington has long said Syrian President Bashar Al Assad has lost the legitimacy to lead, it has made clear that its first priority is to try to rein in IS group.
The meeting will cover stabilising areas such as the Iraqi city of Tikrit, which has been wrested from the group, as well as broader efforts to undercut its finances, stem the flow of foreign fighters and counter its messaging, officials said.
Meanwhile, British Foreign Secretary Philip Hammond said that Britain does not plan to deploy combat troops in Libya but will instead seek to give strategic and intelligence support to its new government.
"We will certainly want to support the new Libyan government in any practical way we can but I don't envisage that there will be a situation where we need or want to put combat troop boots on the ground," Hammond told reporters in Rome.
"I don't think we are likely to think that putting combat troops on the ground is a helpful contribution - there are plenty of armed men in Libya. What they need is organisation, command and control, air-gathered intelligence, strategic organisation."