BEIRUT (AP) — Syrian forces killed at least five people and torched a number of homes in a raid on a farming village Sunday that activists said showed worsening relations between Syria’s myriad religious groups.

The continuing violence further undermines a UN-backed peace plan that is supposed to bring an end to the country’s 14-month-old crisis. A ceasefire that was supposed to begin on April 12 has had only a limited effect, throwing into doubt the rest of the plan, which calls for talks between the regime of President Bashar Assad and those seeking to end his rule.

Sunday’s deaths occurred during a raid by regime forces on the impoverished village of al-Tamana, about 55 kilometers (35 miles) northwest of the city of Hama. The Britain-based Syrian Observatory for Human Rights said five people were killed in the raid and government troops were setting fire to homes.

Speaking via Skype from Hama, activist Mousab Alhamadee said one local rebel leader was killed alongside five civilians.

“He was a hero in the Free Syrian Army who was trying to defend the civilians,” he said, referring to the umbrella group of local, anti-regime militias.

An amateur video posted online Sunday showed men carrying the dead body of a woman from a house. A second video showed men in a mosque praying over five coffins, three of them open with flowers piled on bodies wrapped in white cloth.

The area, a plain of farmland along the Orontes River, is dotted with villages of Christians, Sunni Muslims and Alawites, the offshoot sect of Shiite Islam to which Assad belongs.

Alhamadee, who is from a village near al-Tamana, said sectarian tensions were low before the uprising, but have deteriorated as Sunni villages like al-Tamana joined the anti-Assad uprising.

He said most of the village’s residents had fled and regime forces were setting fire to houses and looting shops.

He and the Observatory also reported shelling in a nearby village, Hayaleen.

“The regime is trying to punish these villages and to put an end to this revolution as quickly as it can,” he said.

Syria’s uprising started in March 2011 with protests calling for political reform. The government brutally cracked down on dissent, and many in the opposition have since taken up arms to defend themselves and attack government troops. Some soldiers also have switched sides and joined forces with the rebels.

World powers have backed the peace plan, which was put forward by UN-Arab League envoy Kofi Annan to end the crisis, but the bloodshed has not stopped. More than 100 UN observers have been deployed in Syria to oversee the truce between the government and armed rebels.

The daily death toll in Syrian has declined as the number of observers has risen, but few experts expect the UN plan to succeed in its entirety. The Observatory said a total of 19 civilians were killed nationwide, plus two rebels and 5 regime soldiers.

Activists also reported government attacks in rebellious Damascus suburbs.

Omar Hamza said via Skype that three people were killed early Sunday by shells and machine gun rounds fired at Douma. The government was raiding other areas looking for activists, he said.

The Observatory also reported three killed in suburbs east of the capital, one of them a rebel commander.

Activist claims could not be independently verified.

The Syrian government did not comment on the reports and bars most media from working in the country.

Also Sunday, two Turkish journalists who had been detained in Syria for two months arrived in Istanbul on a plane from Iran after that country helped negotiate their release by Syrian authorities.

Journalists Adem Ozkose and Hamit Coskun were abducted by militiamen who had blocked a road and were stopping cars and abducting passengers, Ozkose told reporters in Istanbul on Sunday.

He and Coskun were later held separately at a prison in Damascus, where they slept on a concrete floor, had no sunlight and lost track of the days.

“Finding out what day it was made me happy. It made me appreciate freedom. Thank God we were saved, but there are many others inside Syria waiting for freedom,” he said.

Copyright 2012 The Associated Press.