The early reports out certainly sound suspicious though it's a positive sign that this was detected.A passenger was detained by airport authorities in Pakistan after electrical circuits and batteries were found in the soles of his tennis shoes, an airport security official said today.

Officials were investigating what the components could be used for and why they were concealed. Similar materials can be used in the construction of bombs. The man, Faiz Mohammad, was arrested at Karachi's Jinnah International Airport las night, said Munir Ahmed, a spokesman for the airport security force. The materials were detected by a scanner.