Police say a grenade has damaged a Belfast police station in the latest attack by Irish Republican Army dissidents, AP reported. The predawn blast Wednesday injured nobody and damaged the perimeter fence of the Old Park base in north Belfast. Police evacuated nearby homes as British Army explosives experts examined the blast remains. Dissidents last month fired live rounds at two police stations in South Armagh, a Northern Ireland border region long renowned as an IRA power base. Those attacks, claimed by the Real IRA splinter group, also injured nobody.