BBC News with Jonathan Wheatley

The authorities in Yemen say they've arrested a woman in the capital Sanaa in connection with two parcel bombs discovered in air freight consignments in Dubai and Britain on Friday. The arrest follows the seizure in Yemen of more than 20 suspected packages. Here is our Middle East correspondent Jon Leyne.

The Yemeni authorities moved quickly to mount a major security operation. Large numbers of police and soldiers were on the streets of the capital Sanaa. A further 26 suspicious packages came under investigation. Then later in the day it was announced that they'd surrounded the house of a woman suspected of sending the two parcel bombs. She was soon arrested along with her mother. It's most unlikely this was the work of one person working alone. Further investigations in Yemen are likely to focus on the group al-Qaeda in the Arabian Peninsula. US officials are said to be pleasantly surprised at the speed and seriousness of the Yemeni response.