Electricity was cut across Syria on Thursday and Internet connections were briefly disrupted, a pro-Syrian regime media outlet announced.
"The electricity network has been cut in all governorates," pro-regime SANA news agency said, citing a source in the Electricity Ministry.
"Attempts to find the cause of the outage have begun."
A Reuters witness confirmed that electricity had been cut in Damascus, and the London-based Syrian Observatory for Human Rights, which monitors the five-year-old conflict in Syria, said that power had been cut in the "vast majority of governorates."
SANA reported the Syria Telecommunications Company as saying Internet services were partially halted on Thursday "as a result of sudden damage to one of the network hubs." but were later restored.
The war-torn country, since Feb. 27, has been experimenting a fragile process of a cessasation of hostilities since following a major agreement brokered by US and Russia.
UN's Syria envoy Staffan de Mistura said on Thursday that cessation of hostilities is holding, but remains fragile after six days, during which incidents have been contained in the provinces of Homs, Hama, Latakia and Damascus.
De Mistura said that his office was working closely with Russia and the United States to investigate any fighting and "to quickly intervene in order to make sure that the parties on the ground defuse the situation."
The United Nations hopes the cessation of hostilities agreement, which is less binding than a formal ceasefire and was not directly signed by the Syrian warring sides, can precede a more formal ceasefire.