Police in Frankfurt, Germany, are investigating a suspicious envelope addressed to Deutsche Bank CEO Josef Ackermann on Wednesday, putting security forces on alert around the world’s financial leaders. While German police said the package “seemed unusual” and that a bomb disposal expert was sent to the bank’s headquarters, a local NYPD warning said that the letter did indeed contain explosives, but was detected in an X-ray machine and did not detonate. New York banks are “being advised to take precautions.”