let's get to breaking news now out of tunisia. we're receiving reports of a bus explosion that killed at least 12 people in the capitalty of tunis. let's go to joe fryer in london monitoring the story in tunisia. joe? >> reporter: the president of tunisia declared a state of emergency and a curfew after what he's calling a terrorist attack. and a televised address, the president reportedly said the country at war with terrorism and associated press reporting 12 people killed and at least 16 injured in the attack. the president was not on the bus but officials say some type of explosion hit the vehicle carrying members of the presidential guard. that's an elite security force that only protects the president. it happened on a busy tree-lined street in rush hour in the capital city of tunis. still no official confirmation of whether it was a bomb or some other type of explosive and many shocked wandering how any attacker gets close enough to a bus that's filled with so much