Syrian militant groups have threatened to freeze negotiations over their participation in the upcoming peace talks in Kazakhstan over claims of violation of a nationwide ceasefire.

The announcement was made via a statement that warned further advances made by Syrian government forces would also end the ceasefire currently being upheld in the country.

There are also reports that some of the militant groups have fully halted talks over their participation in the Kazakhstan negotiations.

The United Nations warned that four million people in the Syrian capital city had been deprived of safe drinking water supplies for over a week after springs outside the city were deliberately contaminated by the terrorists.