Those who logged onto their Chase checking accounts Monday to find their balance at zero are urged not to panic.



Chicago-based Chase bank officials said via Twitter the accounts have not been hacked and claim the issue was a result of an internal glitch.



"We're looking into reported trans. issues & working to correct an internal issue to show customer balances. We'll keep you updated," @ChaseSupport tweeted Monday night.



By Tuesday morning the account tweeted the bank is "back to business as usual."



"Apologies again for the trouble & thank you for your patience."



A spokesman said it was internal and not an external security breach that led to the error, though many customers worried Monday after finding their accounts wiped of funds.

