Sky News: Twin suicide bombs kill 25 in Karachi

Sky News: Twin suicide bombs kill 25 in Karachi: "Suicide bombers have rammed into a bus in Karachi then hit a hospital to which casualties were being ferried, killing 25 people in the second round of attacks on Shi'ites in the Pakistani city in weeks.

Women and children were among the 12 people killed when a suicide attacker rammed a motorbike bomb into a bus carrying Shi'ites on one of Karachi's busiest roads on Friday, gutting the bus and sending glass flying, officials and witnesses said.

A second bomber killed 13 people, damaging ambulances and the entrance to the casualty department at Jinnah Hospital, where the victims of the first attack were being treated and anxious relatives were gathering.

The attacks in a city largely isolated from Islamist insurgent violence highlighted the terrorist threat in Pakistan, which is on the front line of the US war on Al-Qaeda. Militants have killed over 3,000 people in Pakistan since 2007.

Sectarian violence periodically flares between Sunni and Shi'ite Muslims, who account for about 20 per cent of Pakistan's 167 million-strong population. Such violence has killed more than 4,000 people since the late 1980s."