ROMULUS, Mich. (AP) - Counterterrorism officials are trying to figure out how a would-be bomber managed to get an explosive mixture on board a flight from Amsterdam to Detroit Friday.
The device fizzled when the suspect tried to detonate it and he was subdued by fellow passengers aboard the Northwest Airlines flight. Law enforcement officials say the man appeared to be badly burned on his legs, indicating the explosive was strapped there. Officials say the components were apparently mixed in-flight and included a powdery substance.
The investigation is spreading across three continents. In Yemen, authorities are checking into the Nigerian suspect's claims that he picked up the explosive device and instructions in that country.
Nigeria is opening an investigation, and authorities are ramping up security at the Amsterdam airport. That's where the suspect transferred to the Detroit-bound flight.
Meanwhile, University College London says a student by the suspect's name studied engineering there. London police say they're working with U.S. investigators on the case.