30 October 2010 Last updated at 20:18

In pictures: Plane bomb plot

Security forces patrol the Yemeni capital Sanaa, 30 October

Security forces in the Yemeni capital Sanaa have been on the alert since an apparent cargo plane bomb plot by Yemeni-based militants was intercepted.

Men walk past the FedEx office in Dubai.

Two explosive devices were found in packages. One was intercepted at East Midlands Airport, in the UK. The other was found aboard a cargo plane in Dubai.

A handout picture released by the Emirates News Agency shows the contents of a US-bound parcel displayed by police in Dubai.

In Dubai, the printer was packed into a box which also included a textbook on management, a copy of George Eliot's novel Mill On The Floss, several shawls and a model building.

Parts of a computer printer with explosives loaded into its toner cartridge found in a package onboard a cargo plane coming from Yemen, in Dubai, United Arab Emirates.

The printer had explosives loaded into its toner cartridge and a mobile phone SIM card believed to be the detonator.

A close-up appears to show the explosive substance packed into the toner section of the printer seized on a cargo plane coming from Yemen, in Dubai, United Arab Emirates.

The explosive is believed to be PETN, previously used by al-Qaeda suspects.

Officials in the UK and Dubai are still examining the devices to try to work out how and where they might have been detonated.

The device found at East Midlands Airport had also been inserted into a printer cartridge.

Police officers inspect vehicles on a street in Sanaa, Yemen. Forces in the country search for suspected al-Qaeda militants behind a plot to bomb Jewish targets in Chicago.

Security has been raised in Yemen, with government officials mounting a search for the suspected al-Qaeda militant believed to behind the plot.

30 October 2010 Last updated at 20:18

In pictures: Plane bomb plot

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