A blast has rocked Beirut’s southern suburbs, an area known for its pro-Iranian Hezbollah presence, police sources say. The blast took place on Tuesday night in the Mushrafiyeh-Mouwad street near the Lebanese Labour Ministry, the source said without giving details. Ambulances with wailing sirens were heading to the area, where several cars were ablaze. White smoke rose above the area. Members of the Shiite militia Hezbollah had cordoned off the blast zone. There was no immediate information about casualties from the blast or its cause. The Lebanese capital in central Lebanon is removed from th…