By Mariam Karouny and Douglas Hamilton
BEIRUT (Reuters) - At least 27 Syrian soldiers, rebels and civilians were killed in violence on Friday, opposition activists said, four days before a troop pullback agreed to by President Bashar al-Assad as part of a U.N.-backed peace plan.
The Free Syrian Army (FSA) said it had met a delegation from peace envoy Kofi Annan this week and confirmed its fighters would stop shooting if Assad withdraws his tanks and troops to barracks before a ceasefire deadline next Thursday.
"Talks were held and the FSA said if the regime commits to the plan and withdraws from the cities and returns to its original barracks then we are committed to the plan," Colonel Riad al-Asaad told Reuters. He declined to give further details.
The plan calls for a troop withdrawal by April 10 and a ceasefire by April 12. Assad told Annan two weeks ago he had accepted the terms. The Annan plan does not stipulate a withdrawal to barracks. It says the army must "begin pullback of military concentrations in and around population centers".
The Syrian Observatory for Human Rights said shelling had killed at least 10 people, including four rebel fighters, in the flashpoint central city of Homs. Two soldiers died in separate clashes and one person was killed in the town of Douma, it said.
The British-based Observatory, which has a network of contacts in Syria, also reported seven civilians and four soldiers killed in clashes and bombardments in Anadan, north of Aleppo. Three people were killed in Hama, it said.
U.N. Secretary-General Ban Ki-moon said on Thursday that the conflict was worsening and attacks on civilian areas persisted, despite assurances from Damascus that its troops had already begun withdrawing under the peace plan.
Annan has said the government and opposition must stop fighting at 6 a.m. (0300 GMT) on April 12, if Damascus meets its deadline 48 hours earlier to pull back troops from cities and cease using heavy weapons.
Assad's opponents have accused the Syrian military of using the run-up to the ceasefire to intensify assaults. Syria has now charged insurgents with doing the same.
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Interactive look at Syria http://link.reuters.com/pyt37s
"In recent days terrorist acts committed by armed groups in Syria have escalated, especially since an understanding was reached on Kofi Annan's plan," Syria said in a letter to the United Nations released on Friday.
"The international community and the Security Council must take the necessary measures to prevent and stop the funding of any terrorist activities against Syria," it said.
Syrian forces were laying mines near the border with Turkey to try to block a flow of refugees and supplies for insurgents, rebel activists and a Turkish official said.
"The Syrians have been mining the border, especially the southern Idlib part which has been restricting the flow of refugees," said the official, who declined to give his name.
Turkey said there were now 23,835 Syrian refugees on its territory of whom 2,800 arrived on Thursday alone, more than double the highest previous one-day total.
TANKS IN ACTION
On Friday, activists reported tank fire in the town of Douma near Damascus and in Anadan, Homs and Rastan.
"At least 5 tanks and 10 buses loaded with security men and Shabiha (pro-Assad militia) entered Douma," a local activist said. In Rastan, an activist said FSA fighters confronted a morning tank thrust. "They blocked the advance and the Assad army left. Then artillery started," he said.
Accounts are difficult to verify because Syria's government restricts access to independent journalists.
Assad blames the conflict on foreign-backed "terrorists" and has proposed a parliamentary election on May 7 and other reforms. His opponents dismiss these as a sham, saying it is impossible to have a valid vote while bloodshed continues.
Anti-Assad demonstrations broke out after Friday prayers in the eastern province of Hasakeh, in the town of Qamishli and Deir al-Zor city, activists said. Protesters carried the white and green rebel flag. Some saluted other rebel cities.
Loyalist forces have killed more than 9,000 people during the unrest, according to a U.N. tally. Syria says 6,044 have died, including 2,566 soldiers and police.
Western powers are not convinced Assad will honor the promised truce and believe he may seek loopholes giving him more time to cripple the Free Syrian Army (FSA) and deter protesters.
It is also uncertain whether the FSA has enough control over its fighters to enforce Annan's ceasefire deadline.
(Writing by Douglas Hamilton; Editing by Andrew Roche)