An explosion inside a mosque in eastern Afghanistan injured dozens of people during Friday prayers, a local official said. "Initial reports say that between 25 to 28 worshippers including the mullah have been injured," said Ahmad Zia Abdulzai, a spokesman for the governor of Nangarhar province. According to dpa, he said it was not immediately clear what caused the blast in the mosque in the district of Khogiyani. Provincial police spokesman Hazrat Hossain Mashreqiwal said that it was a bomb rather than a suicide attack.