One official said the explosion rocked a polling station in the city of Aden in southernYemen on Monday and heard gunfire shortly after the explosion.
The blast came a day before the presidential election. There were no reports of casualties.
The official "cause of the explosion a large gap in the wall of the building and smashed thewindows close."
And millions of Yemenis will vote on Tuesday in an election will be the Vice PresidentAbed Rabbo Mansour Hadi, the only candidate after a year of unrest and protests against the rule of President Ali Abdullah Saleh, who ruled the country for thirty years.
Source: Reuters