Dutch Police Taking Lead in Sandwich Needle Probe Dutch police investigating how needles got into six turkey sandwiches on Delta Air Lines flights from Amsterdam to U.S. cities say the sandwiches and needles are being flown back to the Netherlands for tests. Spokesman Robert van Kapel tells The Associated Press that police at Amsterdam's Schiphol Airport are taking the lead in the investigation and cooperating with the FBI in the United States. FILE- In this Tuesday, Jan. 24, 2012, file photo, a Delta Airlines plane taxis past a gate at Logan Airport in Boston. Police at Amsterdam's Schiphol Airport have opened a criminal investigation into how needles got into turkey sandwiches served to passengers on Delta Air Lines flights from Amsterdam to the United States, a spokesman said Tuesday. The FBI also is investigating the incidents. (AP Photo/Charles Krupa, File) Close Van Kapel said Wednesday the sandwiches will undergo forensic tests by experts in Amsterdam. Police are interviewing staff at the catering company that made the sandwiches in a kitchen near Schiphol Airport as well as Delta staff. A Delta spokeswoman said the needles were found Sunday in six sandwiches on flights to Minneapolis, Seattle and Atlanta. Passengers discovered four of them.