Amsterdam, Netherlands (CNN) -- Dutch authorities can detain two men held on suspicion of plotting a terrorist act for another day without charging them, a prosecution spokesman said Wednesday.
They could "in theory" appear before a judge, but will not necessarily do so, Ernst Koelman said.
The two men arrested at Schiphol International Airport in the Netherlands Monday are Yemeni citizens who were en route to the Yemeni capital, Sanaa, from Chicago, Illinois, Dutch officials said.
Authorities continued to question them Tuesday, Dutch prosecutors said.
A U.S. law enforcement source said Monday the men may have been trying to test U.S. airport security by putting bottles attached to electronic devices in their checked baggage.
But two U.S. government officials said Tuesday an initial U.S. investigation into the men shows no evidence of terrorism and no indication the men even knew each other.
CNN
