Syria's Assad must go, Kerry insists US Secretary of State John Kerry insists Syrian President Bashar al-Assad will have to step down as part of any political solution in Syria, as he held a third day of talks on the bloody conflict. Speaking as he met Jordanian Foreign Minister Nasser Judeh, Kerry said all sides were working to "effect a transition government by mutual consent of both sides, which clearly means that in our judgment President Assad will not be a component of that transitional government." Kerry also officially unveiled $US100 million ($A99.10 million) in additional US humanitarian aid for Syrian refugees, almost half of which will go to help Jordan struggling to cope with a tide of people fleeing the 26-month war. Some 2,000 people are flooding across the border into Jordan every day, and the country now hosts some 525,000 refugees, Judeh said at the start of the talks in Rome. We have 10 per cent of our population today, in the form of Syrian refugees. It is expected to rise to about 20 to 25 per cent given the current rates by the end of this year, and possibly to about 40 per cent by the middle of 2014," he said. "No country can cope with the numbers as huge as the numbers I've just described," he warned, adding Jordan was very grateful for the help of the international community. Plans for an international conference to try to find a solution to the crisis were also continuing, Kerry said, after he agreed in talks in Moscow that he and Russian Foreign Minister Sergei Lavrov would work in tandem on the issue. He had spoken with most of the foreign ministers from the countries involved and there is a "very positive response and a very strong desire to move to this conference and to try to find, at least exhaust the possibilities of finding, a political way forward." UN chief Ban Ki-moon had also been in touch, so "we are going to forge ahead very, very directly to work with all of the parties to bring that conference together," Kerry added. It's hoped the conference, aimed at finding a path towards a transitional government in Syria, could be held by the end of May, possibly in Geneva. US ambassador to Syria, Robert Ford, has meanwhile also met with the Syrian opposition in Istanbul on Wednesday to discuss the way forward, Kerry said. Since the war erupted to oust Assad, more than 1.5 million Syrians have fled the country into neighbouring nations, including Turkey, Jordan and Lebanon, vastly straining their resources. Up to four million more could be displaced within the country as they seek to flee the fierce fighting, which has already claimed some 70,000 lives. Meanwhile, Syria will "give Hezbollah everything" in recognition of its support and will follow the militant group's model of "resistance" against Israel, a Lebanese newspaper on Thursday quoted President Bashar al-Assad as saying. His comments, published by Al-Akhbar, reportedly came during meetings with Lebanese visitors in Damascus and appeared intended to refute any suggestion that Israeli raids on Syrian targets would halt assistance to the Shi'ite group Hezbollah in Lebanon. The newspaper said visitors quoted Assad as expressing "confidence, satisfaction and great gratitude towards Hezbollah." The organisation is a long-time ally of the Syrian regime and has sent fighters to battle alongside Assad's troops, particularly in the Qusayr district of the central province of Homs. Also on Thursday, anti-regime activists say Syrian warplanes are pounding rebel positions in two northern provinces. The Britain-based Syrian Observatory for Human Rights says the air force is targeting opposition forces in the battle for the Mannagh air base outside of northern city of Aleppo. Rebels stormed the base near the border with Turkey on Sunday. They captured parts of it but could not hold on, because of the regime's superior air power. In neighbouring Idlib province, there are heavy clashes outside several army bases near the government-controlled provincial capital. Government troops and fighter planes are hitting the rebels, the Observatory said.