Syria's air force "purposely targeted" a spring outside Damascus in December, cutting off water supplies for 5.5 million people living in and around the city, the United Nations independent International Commission of Inquiry on Syria said on Tuesday.
"A terrorist blows himself up inside the old palace of justice in Damascus and there are dead and wounded", state television said in a breaking news alert.
Government authorities ordered an evacuation of the area over fears of further attacks, Almasdar News reports.
No terror group has yet claimed responsibility of this blast.
Syrian security forces gather under a portrait of President Bashar Assad at the Palace of Justice in Damascus following a suicide bombing on Wednesday.
"Brave humanitarians will continue to stand with the people of Syria to deliver aid to millions of civilians who are most in need - regardless of which side they are perceived to be on".
Over the weekend two bombings in Damascus targeting buses of Iraqi pilgrims killed more than 70 people. An Al Qaeda-linked terrorist alliance, Levant Liberation Committee, also known as Hayat Tahrir al Sham, claimed responsibility for the blasts.
A government delegation led by Syria's United Nations ambassador Bashar Jaafari, meanwhile, began meetings on Tuesday with Russian officials in the Kazakhstan capital of Astana. Syria's armed opposition boycotted those talks due to what they say are ongoing government military offensives across the country.
Around 5.5 million people in Damascus and its suburbs were cut off from water when fighting intensified in Wadi Barada near the Syrian capital in late December.
A government delegation led by Syria's United Nations ambassador, Bashar al-Jaafari, began meetings Tuesday with Russian officials in Astana.