Report: Huge explosion rocks Mezzeh neighborhood in Damascus

A huge explosion rocked the Sheikh Saad Al-Mezzeh neighborhood in Damascus Tuesday evening, activists said according to Al Jazeera.
There were no immediate reports on casualties.
Syria has agreed to UN-Arab League envoy to Syria Kofi Annan's April 10 ceasefire agreement, which would see Syrian troops pull out of cities across the country after a year-long civil conflict which has killed more than 9,000, according to the UN.