Fear stalks Pakistan's election candidates

In Pakistan a political candidate has been killed in a shooting in the Southern port city of Karachi, together with his young son.

It is the latest incident of election-related violence, which has claimed more than 70 lives in the past month.

The Pakistan Taliban have been targeting candidates from the three main secular parties, which formed the last coalition government.

Officials say it is the most violent election campaign the country has ever seen.

Orla Guerin reports from Karachi.

This report contains some disturbing images