Cargo plane packages spark global terror alert

A bomb squad officer carries a package away from a UPS cargo plane as its contents are searched Photograph: Reuters

A package is loaded on to a police helicopter at East Midlands airport in Castle Donington as US and British security officials search UPS cargo flights in the UK and Dubai after the discovery of suspect packages sent from Yemen Photograph: Darren Staples/Reuters

Police and bomb squad officers surround a UPS cargo plane being searched in Newark, New Jersey Photograph: Reuters

A forensics officer removes a package from a UPS container at East Midlands airport Photograph: Darren Staples/Reuters

Investigators board a UPS jet isolated on a runway at Philadelphia International airport Photograph: Matt Rourke/AP

Parts of a printer which was contained in a package intercepted by Dubai security officials. The US-bound parcel contained a bomb hidden in a printer and bore the hallmarks of al-Qaida, Dubai police said Photograph: Reuters

Workers load packages on to a truck at Sana'a International airport as Yemeni forces search for suspected al-Qaida militants behind an alleged plot to bomb Jewish targets in Chicago, uncovered by the interception of the explosive packages Photograph: Khaled Abdullah/Reuters

People walk past the UPS office in the Yemeni capital of Sana'a Photograph: AP

This photo released by Dubai police claims to show parts of a computer printer with explosives loaded into its toner cartridge found in a package on a cargo plane flying from Yemen Photograph: AP

A close-up of part of the computer printer found in a package on the cargo plane in Dubai Photograph: AP