A United Nations humanitarian team visited Syria on Sunday, as the International Committee of the Red Cross expressed hopes its delegates would soon visit Syrians jailed since the start of the protests.

The U.N. mission began its first full day in Damascus on Sunday, arriving the previous evening to assess humanitarian needs in the wake of the crackdown which have left more than 2,000 people dead.

Turkey believes it is too soon to call for Syrian President Bashar al-Assad to step down, a government official told Agence France Presse on Friday.

"We are not there yet," the official said, speaking on condition of anonymity.

Damascus accused Washington and the West on Thursday of seeking to stoke violence in Syria, after U.S. President Barack Obama and European leaders said that Syrian President Bashar al-Assad must step down.

"It is strange that instead of offering (Damascus) a helping hand to implement its program of reforms, the West and Obama are seeking to stoke more violence in Syria," Reem Haddad, the information ministry's director of external relations, told Agence France Presse.

The staff of the U.S. Treasury Department, which is in charge of following up on the financial activities of Syrian President Bashar al-Assad’s family and entourage, believe that they are getting closer to unveiling a link between Assad’s financial interests and Premier Najib Miqati and his brother Taha, who is also a businessman.

According to a U.S. report to be published Friday by the Kuwaiti daily al-Rai, the set of sanctions recently imposed on Syriatel -- Syria’s largest mobile phone operator owned by Assad’s cousin Rami Makhlouf -- were supposed to be expanded to include either Miqati or his brother Taha for their role in establishing the Syrian firm and introducing the cellphone technology to the Syrian market more than a decade ago.

President Nicolas Sarkozy of France, Germany's Chancellor Angela Merkel and British Prime Minister David Cameron on Thursday jointly urged Syria's embattled leader Bashar al-Assad to step down.

"We call on him to face the reality of the complete rejection of his regime by the Syrian people and to step aside in the best interests of Syria and the unity of its people," they said in a joint statement.

U.S. President Barack Obama demanded Thursday that Syrian President Bashar al-Assad "step aside" and imposed tough sanctions on Damascus including an asset freeze and ban on U.S. investments in Syria.

"We have consistently said that President Assad must lead a democratic transition or get out of the way. He has not led. For the sake of the Syrian people, the time has come for President Assad to step aside," Obama said.

The FBI is investigating allegations that Syria is intimidating and threatening dissidents in the United States, according to U.S.-based Syrians who say federal agents have questioned them.

Three dissidents who met with U.S. Secretary of State Hillary Clinton in Washington two weeks ago told Agence France Presse that FBI agents raised concerns about their safety and asked who might be behind the campaign.

The Lebanese subsidiary of a Syrian bank sanctioned by the United States denied on Wednesday "unfounded political allegations" that it dealt with North Korea and Iran.

"Since the establishment of our institution, we have never had any operation with either a North Korean or an Iranian entity even before the existing sanctions," the Syrian Lebanese Commercial Bank said.

Russia is continuing to supply weapons to Syria despite international pressure to cease trading, the head of the arms export agency told journalists on Wednesday.

"While no sanctions are announced, while there are no orders or directions from the government, we are obliged to fulfil our contractual obligations, which we are now doing," Rosoboronexport chief Anatoly Isaikin said.

Turkish Foreign Minister Ahmet Davutoglu said Tuesday that Turkey is opposed to any foreign intervention in Syria, where the regime's violent crackdown on pro-democracy protests has drawn international condemnation.

"We do not want foreign intervention in Syria," Davutoglu said after a Ramadan fast breaking dinner in Ankara.