A bomb apparently carried by a motorcyclist exploded at a mosque in the southeastern Iranian city of Zahedan on Wednesday but caused no casualties, the local news agency reported. The blast occurred in Zahedan's Al-Ghadir mosque complex, the report said, quoting provincial police officer Salah Asgharpour. The officer said initial reports indicated that the bomb was carried by a man who arrived on a motorcycle and then tried to gain access to the mosque.