A leading Syrian opponent said President Bashar al-Assad's regime is responsible for the armament of some groups in Syria, citing the government's crackdown on dissent.

"Some people are obliged to arm themselves due to the continuation of violence," Hassan Abdul-Azim, head of the National Coordination Body for the forces of National Democratic Change in Syria, said Saturday.

Speaking to reporters following a 60-minute meeting with Arab League-United Nations special envoy for Syria Kofi Annan, Abdul- Azim said there must be a cease-fire, coupled with the release of all detainees, adding that there should be a coordination between the AL and the UN to solve the Syrian crisis.

The crisis in Syria is "complicated and is going through dangerous phases," he said, stressing that no solution could be reached in light of violence, murder, arrest and displacement.

Abdul-Azim, however, made it clear that "there is no horizon for a foreign military intervention... There should be a solution to the crisis because our people are suffering."

Abdul-Azim said his group was briefed by Annan on the special envoy's role and the endeavor of the UN, the AL and other international efforts to solve the crisis "with minimum losses."

Annan met earlier in the day with Assad, according to state-run SANA news agency which described the meeting as "positive."

Annan, who arrived in Syria's capital Damascus on Saturday to mediate the year-long crisis, stressed his "commitment to work in a just, evenhanded and independent way," and voiced "rejection of any foreign interference" in Syrian affairs, as well as his belief in peaceful solution.

The Syrian government has accused some Arab and Western countries of providing weapons and financial support to the armed groups in Syria. It said in December 2011 that "armed terrorist groups" had killed more than 2,000 army and security personnel during the unrest.

The United Nations said recently that "well over" 7,500 people have died in Syria's violence.