| The ceasefire is meant to apply across Syria - and has mostly been holding |
Syrian rebel groups say they are
suspending participation in the preparations for peace talks planned by
Russia and Turkey for later this month.
| The rebels have accused the government of ceasefire violations near Damascus |
The peace talks are due to be held in Astana, Kazakhstan.
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"As these violations are continuing, the rebel factions announce... the freezing of all discussion linked to the Astana negotiations," it said.
The groups highlighted fighting in the rebel-held region of Wadi Barada, north-west of Damascus, which they say has been subjected to almost-daily bombing raids and bombardment by Syrian forces and their Hezbollah allies.
The area does not fall under the ceasefire agreement, given the presence of Jabhat Fateh al-Sham (JFS), a jihadist group which was excluded from the deal.
Wadi Barada contains a major spring, which supplies water to millions of residents in the capital. The government has accused the rebels of polluting it with diesel, which they deny.