The Syrian Observatory for Human Rights (SOHR) said on Thursday that the Syrian regime forces and rebels failed to reach a ceasefire in the rebel-held Eastern Ghouta, suburb of the Syrian capital of Damascus.
The UK based SOHR said the reasons for the failure of the talks were unknown. The SOHR said on Wednesday, a ceasefire was about to be launched for 15 days starting on Thursday.
The director of the SOHR Rami Abdul Rahman said that the talks were ongoing for a few days and were mediated by international party.
According to the SOHR the confrontations between pro-regime forces and rebels are still on going.
Eastern Ghouta, which was targeted with chemical weapons in 2013, have been under intensified aerial bombardment by regime war planes.
The UN estimates the death toll in Syria, since the war started as an uprise in 2011, to be at least 250,000, while the SOHR states that the number have now reached 350,000.
A further estimate of 350,000 refugees have sought asylum in European Union countries.
Russia, the main ally of Syrian regime's leader Bashar al Assad, started its air campaign in Syria targeting Assad’s opponents on September 30, forcing more than 120,000 Syrians to leave their homes.
About 5 million Syrians have taken refuge in neighbouring countries Turkey, Lebanon, Iraq, Jordan and Egypt, with Turkey hosting the largest group with over 2 million in camps and Turkish cities.
Thousands are still pushing towards EU countries, causing a global refugee crisis urging for an immediate solution in Syria.