WASHINGTON (AP) — Secretary of State Hillary Rodham Clinton issued a parting warning Thursday about Syria’s civil war, accusing Iran of playing an increasingly prominent role in directing the violence, which she said heightened the danger of a larger regional conflict that draws in Israel or other neighbors.

“I’ve done what was possible to do,” Clinton told reporters on the eve of her last day as secretary of state.

But she painted a harrowing picture of a war that could still get worse.

“The worst kind of predictions about what could happen internally and spilling over the borders of Syria are certainly within the realm of the possible now,” she said.

The conflict “is distressing on all fronts,” Clinton told a roundtable of journalists Thursday, a day before John Kerry is sworn in as her successor. She pointed the finger primarily at Iran, accusing it of dispatching more personnel and better military materiel to President Bashar Assad’s regime to help him defeat rebel forces. Its Lebanese proxy, Hezbollah, is also playing a bigger role in the conflict.

“The Iranians are all in for Assad, and there is very little room for any kind of dialogue with them,” Clinton said.

She spoke after Syria threatened Thursday to retaliate for an Israeli airstrike, and its ally Iran warned ominously that the Jewish state would regret the attack.

In a letter to the U.N. secretary-general, Assad’s regime stressed its “right to defend itself, its territory and sovereignty” and holding Israel and its supporters accountable. And Ali Abdul-Karim Ali, Assad’s ambassador in Lebanon, said his government maintained “the option and the capacity to surprise in retaliation.”

Clinton declined to talk specifically about Israel’s strike, which U.S. officials described as targeting trucks containing sophisticated Russian-made SA-17 antiaircraft missiles. The trucks were next to a military research facility, and the strike hit both the trucks and the facility, U.S. officials said.

If the SA-17s were to have reached Hezbollah, they would have greatly inhibited the Israeli air force’s ability to operate in Lebanon, where Israel has flown frequent sorties in recent years. The attack has inflamed regional tensions already running high over Syria’s 22-month-old civil war, and which has already led to deaths in neighboring Turkey and Lebanon.

In her candid assessment, Clinton spread the criticism to Russia, which has stymied U.S.-led efforts to set global sanctions against the Syrian regime at the U.N. Security Council. Washington and Moscow have remained in a three-way dialogue with the U.N. special envoy for Syria, Lakhdar Brahimi, since late last year, but Clinton said the Russians were simultaneously providing financial assistance and military equipment to Assad.

“The Russians are not passive bystanders in their support for Assad. They have been much more active,” she told reporters. “But maybe they will change. And maybe they will be more open to an international solution because they can’t look at what’s happening and not believe it could be incredibly dangerous to everyone’s interests, including theirs.”

filed under: