(CNN) -- Syrian President Bashar al-Assad insists he will "live and die" in Syria, even as countries offer him safe passage in exchange for halting a gruesome civil war.
"I'm not a puppet, and I was not made by the West to go to the West or to any other country," he told Russia Today TV. "I am Syrian. I was made in Syria and to live and die in Syria."
He also made an ominous threat against foreign intervention, saying it would have a "domino impact" on the world.
"I think that the cost of foreign invasion of Syria, if it happened, would be greater than one that the whole world can afford," he told Russia Today. "Because if there were problems in Syria, particularly as we are the last bastion of secularism, stability and coexistence in the region, it will have a domino impact that will affect the world from the Atlantic Ocean to the Pacific Ocean.
"And you know its implications on the rest of the world. I do not think that the West is moving in this direction, but if they do, no one can predict what will happen after."
Al-Assad's comments came after British Prime Minister David Cameron broached the idea of giving him "safe passage" if that's what it takes to stop the bloodshed in Syria.
"Anything, anything to get that man out of the country and to have a safe transition in Syria," Cameron told Al-Arabiya TV. "Of course I would favor him facing the full force of international law and justice for what he's done. I am certainly not offering him an exit plan to Britain, but if he wants to leave, he could leave; that could be arranged."
Even Tunisia, the first country in the region last year to oust its longtime ruler, has offered asylum to al-Assad in an attempt to prevent further violence.
Meanwhile, a prominent Syrian opposition group and Western leaders are trying to unite the opposition to form an alternative to al-Assad's government.
But while the Syrian National Council is trying to maintain a majority rule in unification efforts, the West is trying to dilute the group's dominance.
Once viewed by Western countries as "a legitimate representative of the Syrian opposition," the SNC scrambled to regroup after Western leaders said it should no longer be the face of the Syrian rebellion.
The SNC announced the formation of a "national conference" in which "all opposition groups participate, with SNC having the highest percentage of representation."
"The National Conference shall consist of 300 participants from the SNC, local councils in the liberated areas, defected technocrats, independent opposition groups and national armed resistance groups under the umbrella of the (rebel) Free Syrian Army," the group said.
Representatives from Britain, France, the United States and Turkey are meeting in Qatar Thursday to try to ensure Syria's opposition is represented by more than just the Syrian National Council.
"Our objective is to encourage Syria's opposition groups to unite around a vision for a democratic and stable Syria," British Foreign Secretary William Hague said in a statement. "This is necessary to offer the Syrian people a credible alternative to the Assad regime and to achieve an inclusive political transition that ends the appalling bloodshed and reflects the will of the Syrian people."
Meanwhile, Turkey urged the international community to do more to support Syrian-led efforts to resolve the crisis, and warned against further delay.
"There is not a moment to lose," Turkish Foreign Minister Ahmet Davutoglu told delegates in Doha, Qatar, Thursday, according to Turkey's semiofficial Anadolu news agency.
The Doha meeting comes after U.S. Secretary of State Hillary Clinton said the SNC -- which consists largely of expatriates -- should no longer be considered the "visible leader" of efforts to form a new government. Clinton said the opposition must include seats for "those who are on the front lines fighting and dying today."
The inability so far to create a unified opposition front has helped prolong Syria's bloody conflict, which has claimed the lives of more than 32,000 people over the past 20 months.
In other developments:
The Red Cross is unable to "cope" with the increasingly deteriorating humanitarian situation in Syria, Peter Maurer, president of the International Committee of the Red Cross, said in Geneva, Switzerland, Thursday.
"The seriousness of the crisis is deepening every day and this trend has been uninterrupted since the summer," he said. "There are a number of blind spots where we know no aid has reached the population."
Aid workers have to contend with a complex situation and obstacles on the ground that include security threats and military or bureaucratic restrictions on access, ICRC spokeswoman Carla Haddad Mardini said.
"We try to fill the cracks which open, and whenever we have an opportunity to deliver aid, we go ahead," Maurer said.
At least 64 people have died in Syria so far Thursday, according to the Local Coordination Committees, an opposition activist network. Of those, 22 were killed in Damascus and its suburbs, the LCC said.
A car bomb exploded in Sayda Zainab, a neighborhood in the Damascus countryside, according to the Syrian Observatory for Human Rights, a London-based opposition group. There was no immediate information on how many people were killed. Saida Zaynab is home to a historic Shia shrine that draws thousands of pilgrims every year.
Fighting between loyalist Syrian forces and fighters from the Free Syrian Army also raged along Syria's border with Turkey, leading Turkish authorities to close schools in the border town of Ceylanpinar.
The Syrian Observatory for Human Rights also said at least 10 rebels and 16 Syrian troops were killed on the Syrian side of the border, in Hasaka province. Some rebels entered Syria from Turkey and engaged the Syrian army in clashes, the group said.
At the same time, Turkish President Abdullah Gul said his country was drawing up contingency plans with the NATO military alliance to fortify its border with Syria.
Gul told reporters Thursday that because of the ongoing civil war in Syria and its possible repercussions for NATO member Turkey, every measure was being considered to counter the risks. Turkish and international media have reported in recent days those options include the installation of Patriot missiles along the border, something Prime Minister Recep Tayyip Erdogan denied Wednesday.
Several stray mortar rounds and a tank shell landed Thursday in the Golan Heights -- captured by the Jewish state from Syria in the 1967 Six-Day War -- as a result of fighting inside Syria, according to the Israeli military.
One of the shells landed in the Israeli settlement of Alonei HaBashan, but there were no reports of damage or injuries, the Israeli military said.
CNN's Arwa Damon, Ivan Watson and Salma Abdelaziz contributed to this report.