Powerful explosion rocks Lebanon's capital

A general view of the damaged headquarters building of Blom Bank where a bomb exploded, in Beirut, Lebanon, Sunday, June 12, 2016. A powerful bomb exploded in Beirut on Sunday, destroying several cars and severely damaging one of Lebanon's biggest banks, but causing no casualties, officials said. (AP Photo/Hussein Malla) (The Associated Press)

Lebanese army and citizens gather at the site where a bomb was placed under a car, in Beirut, Lebanon, Sunday, June 12, 2016. A powerful bomb exploded in Beirut on Sunday, destroying several cars and severely damaging one of Lebanon's biggest banks, but causing no casualties, officials said. (AP Photo/Bilal Hussein) (The Associated Press)

Civil Defense workers and Lebanese army soldiers gather at the scene where a bomb exploded near the headquarters building of Blom Bank, in Beirut, Lebanon, Sunday, June 12, 2016. A powerful bomb exploded in Beirut on Sunday, destroying several cars and severely damaging one of Lebanon's biggest banks, but causing no casualties, officials said. (AP Photo/Hussein Malla) (The Associated Press)

A powerful explosion has rocked the Lebanese capital, and ambulances are rushing to the scene.

The explosion in the upscale Verdun district on Sunday destroyed several cars and caused severe damage to one of Lebanon's biggest banks.

The nature of the blast was not immediately clear and there was no immediate word on casualties. The explosion occurred as residents sat down for iftar, the meal that breaks the daylong fast for observing Muslims during the holy month of Ramadan.