VIENNA, Nov. 18 (Xinhuanet) -- Austrian police on Friday enhanced security around the mosques in Vienna one day after a bomb went off at a building housing a Muslim prayer center, an official said.

    Security is routinely heightened "in sensitive times," said Gert Zander, an official in the police anti-terrorism department.

    Extra officers will patrol areas around Vienna's 60 mosques on Friday, he said.

    A homemade bomb went off early Thursday, blowing out windows and heavily damaging the first floor of the building, which housed a Muslim prayer center. No one was injured in the blast.

    It remained unclear what the explosion was targeted at and what explosives were used, Zander said. Enditem