UN investigation team resumed Wednesday their probing mission in the countryside of Damascus, a day after suspending their activities due to security reasons, a UN spokesman Khaled al-Masri told Xinhua.

Al-Masri said the team resumed their probe at an unspecified location in the countryside of Damascus.

A day earlier, the team postponed its second day of on-site probe due to safety concerns, following an attack on Monday that damaged one of their vehicles.

UN Secretary-General Ban Ki-moon urged all sides in the conflict to "give safe passage and access" to the team. He said " It is in the interest of all sides to bring factual evidence and clarity to a situation which has brought great suffering to the people of Syria."

The team arrived in Syria earlier this week to probe the alleged use of chemical weapons in the unrest-torn country. After their arrival, the Syrian opposition on Aug. 21 claimed that 1,300 people were killed in a chemical weapon attack carried out by the government forces on militant strongholds in the suburbs of Damascus. The Syrian government strongly denied the accusation.

The latest incident unleashed a barrage of threats of taking military actions by the United States and its allies.