DAMASCUS — Warring sides in Syria have agreed to extend a ceasefire in a rebel-held town near the border with Lebanon and two Shi’a villages in the northwest, and to evacuate wounded, sources close to talks said.

The truce is the second in a month in those areas between the Syrian army and its Hezbollah allies on one side and insurgents on the other. It came into force at 6 a.m. on Thursday.

The Syrian Observatory for Human Rights, which monitors the conflict, said there was “calm” in the areas early on Thursday.

Sources close to negotiations on both sides told Reuters later in the day the ceasefire had been extended from two to three days.

They said the sides had agreed to facilitate an evacuation of wounded people from the town of Zabadani and from the villages of Kefraya and al-Foua in the province of Idlib, beginning on Friday.

A source close to the government side said talks were continuing over other matters including a withdrawal of fighters from Zabadani and an evacuation of civilians from the villages.

In the meantime, wounded people from Zabadani were to be taken to Idlib province, which is mostly under rebel control, that source said.

The wounded from Kefraya and al-Foua would go to government-held Latakia, in President Bashar al-Assad’s coastal heartland.

A source on the rebel side said the wounded leaving the two Shi’a villages would travel under the protection of insurgent Sunni Islamist group Ahrar al-Sham.

The negotiations have been led on the rebel side by Ahrar al-Sham. The ceasefires are in western Syria, away from the main strongholds of ISIS.