- Activist says Homs bombardment "is absolutely unbearable"
- A Syrian opposition group visits Russia
- Kofi Annan is visiting Qatar for an Arab League meeting
- A Syrian envoy will visit China Wednesday
Are you there? Send us your images or video. Also, read this report in Arabic.
(CNN) -- Russia's top diplomat took a shot at the Western and Arab attempts to bring democratic change to Syria Tuesday.
Foreign Minister Sergey Lavrov singled out the Friends of the Syrian People, a coalition of dozens of nations led by the United States and the Arab League calling for tough action against the Damascus regime.
"There are outside forces that are not interested in the success of the current U.N. Security Council efforts," Lavrov told reporters. "They are trying everything possible to substitute the Security Council with various unofficial formats such as the 'Friends of Syria' or some other forms.
"And (they are trying), with everything possible, to influence the Syrian opposition so that it doesn't work with the government in maintaining a cease-fire and setting up future dialogue."
Lavrov made the remarks as monitors tried to observe a U.N.-backed cease-fire that was supposed to have been in effect since Thursday.
Rice on Syria: Reason to be skeptical 
Homs, Syria, under a shaky cease-fire 
Syrian refugees too scared to return They are reviewing the government and opposition forces' adherence to U.N. envoy Kofi Annan's six-point peace plan, which calls for a halt in violence, humanitarian access and an "inclusive Syrian-led political process."
Annan's effort is supported by the Syrian regime, Russia, China, the United States, Turkey and the Arab world.
Despite a relative drop-off in reported deaths immediately after the Thursday cease-fire deadline, violence has persisted in Syria. At least 53 people were found dead across the country Tuesday, the opposition Local Coordination Committees of Syria said.
Most of those slain were found in Idlib province and other deaths occurred in Homs, Daraa and Damascus.
Abu Faris, an activist in the volatile city of Homs, told CNN that the military is firing rockets and mortars at the Homs neighborhoods of Khalidya and al Bayda.
"Today we have witnessed some of the worst attacks on Khalidya," he said. "It is absolutely unbearable."
The state-run Syrian Arab News Agency has consistently blamed "armed terrorist groups" for the violence and said aggression by the groups had "hysterically escalated" since the start of the cease-fire. But activist groups every day have cited killings by government security forces.
U.S. Ambassador to the U.N. Susan Rice said Monday that President Bashar al-Assad did agree to the plan, and it largely held "for a couple of days." But the shelling of the city of Homs, for example, resumed Saturday and has persisted, she said.
Syria has been engulfed in violence for 13 months as a national uprising spread after the government began cracking down on peaceful protests. The United Nations estimates at least 9,000 people have died since the protests began, while others put the death toll at more than 11,000.
CNN cannot independently verify reports of violence and deaths, as the government has severely restricted access by international media.
The United States and the United Nations have slammed the crackdown, and there have been international calls for al-Assad to leave office.
Russia, long a staunch ally of Syria, and China have thwarted tough Security Council action against Damascus, including calls for the president to step down.
After those countries vetoed a U.N. Security Council resolution in February, the United States, Arab nations, Turkey and other groups formed Friends of the Syrian People, an initiative to bring democratic change to the nation.
The group backs the efforts of the Syrian National Council -- an opposition movement with strong backing among Syrian activists and citizens -- and other opposition groups to pursue a democratic system.
Representatives from one opposition group, the National Coordination Committee for Democratic Change, visited Russia Tuesday.
The group's leader, Hasan Abdul Azim, said the Annan plan is the "last chance" for peace in Syria, Russian media reported. He is quoted as saying that the "Syrian dialogue needs" help from international groups such as the United Nations and the Arab League.
Andrew Tabler, a Syria expert at the Washington Institute for Near East Policy, describes the coordination committee, based in Syria, as an "older opposition" that doesn't have the mass grass-roots and youth support of the Syrian National Council.
However, he said, "this is the established opposition the regime would rather dialogue with."
Annan will be in Qatar Tuesday to participate in an Arab League meeting on Syria, said his spokesman, Ahmad Fawzi.
Syrian Foreign Minister Walid Moallem "will pay a working visit to China" Wednesday at the invitation of Chinese Foreign Minister Yang Jiechi, China's state-run Xinhua news agency said.
CNN's Saad Abedine, Salma Abdelaziz and Ruba Alhenawi contributed to this report.
