Taleban officials in Afghanistan say a bomb exploded inside the Communications ministry building in the centre of the capital, Kabul, late on Saturday but there were no casualties.

A spokesman said the bomb shattered windows in the building.

He said no-one had been detained in connection with the incident yet.

The Taleban last month hanged four men for a series of bomb blasts in Kabul, saying they were connected to the opposition forces of Ahmed Shah Masood.

The opposition has denied this.

From the newsroom of the BBC World Service