Car bomb at police HQ in Egypt city kills 14: medics

CAIRO- A powerful car bomb tore through a police headquarters in the Egyptian city of Mansoura early Tuesday, killing at least 14 people, mostly policemen, medics and officials said.
The bombing comes just weeks before Egypt holds a referendum on a new constitution that is billed by the country's military-installed authorities as the first step towards democratic rule after the army ousted Islamist president Mohamed Morsi in July.