Over 1,000 workers at the Port of New York and New Jersey -- the largest on the East Coast -- went on strike Friday morning.
One problem with the strike: the Port Authority, which operates the port, says it isn't sure why workers decided not to show up."We don't know why they walked out," Steve Coleman, a spokesperson for the Port Authority, wrote in an email to CNNMoney.
In a statement, the Port Authority strongly urged port workers, affiliated with the International Longshoreman's Association, to return to work and that "differences" would be resolved afterward.