Kabul Green Zone: Blast kills many, officials say
At least three people have been killed and 13 injured in a powerful explosion in central Kabul, Afghan officials say.
Ambulances have been ferrying victims of the blast in the capital's diplomatic zone to hospital.
The number of dead and injured is expected to rise. A Reuters TV crew counted eight people who appeared dead.
It is not clear what caused the blast. Kabul has been targeted by the Taliban and other militants on many occasions in recent months.
In May a huge bomb in the capital's so-called Green Zone – where many diplomatic missions are based – left more than 150 people dead.
It was the deadliest suicide attack by insurgents in Afghanistan since the Taliban were driven from power by US-led forces in 2001.