DAMASCUS, July 6, 2018 (MENA) - A ceasefire has been reached in Syria as a new round of negotiations began in the southern town of Busra al-Sham, where four rounds of talks have been held since Saturday but failed to reach any agreement, Syrian opposition sources said on Friday. Armored vehicles and a tank with a Russian flag were seen heading towards the Nasib border crossing between Jordan and Syria, Al Arabiya quoted several witnesses near the crossing as saying. Earlier in the day, the Syrian Observatory for Human Rights said that Syrian government's warplanes raided the outskirts of the towns of Nasib, Tafas and al Naimah in southern Syria, adding that the warplanes dropped 10 explosive barrels on Daraa al- Balad. The Syrian forces have launched a military operation on the Syrian-Jordanian border to reach the Nasib border crossing.