Improvised Mobile Device
Interesrting photos of mobile phone and wireless device released on the Internet from US military source, apparently having been altered to act as a detonator.
Apart from the electronics wrapped on the outside of the Nokia mobile 'phone, apparently the disturbing photo also shows the handset LCD displaying "01 Call Missed".
This photo was apparently issued courtesy of the US Department of Defense.
Conclusion: I trust your seizure procedures and handling procedures are up-to-date.