BETHPAGE - Tens of thousands of Long Island residents are worried about their bank accounts after a Bethpage Federal Credit Union security leak.

Bank officials say Visa debit card information for 86,000 credit union members was posted online for a month. They say members' names, addresses and account numbers were posted, but their Social Security and PIN numbers were not exposed. The bank's CEO, Kirk Kordeleski, says an employee mistakenly transferred information for debit card customers through a non-secure email system back on May 3. The mistake wasn't discovered until a month later, when someone stumbled on the data through a Google search. So far, no fraud has been reported.The bank says it has begun contacting members whose information was compromised. Bethpage Federal Credit Union is offering free credit monitoring to those affected.