Workers arrived at Maspeth Federal Savings Bank on Monday only to discover that several dozen safe deposit boxes were missing.

They did not have to look far to find them.

When the police arrived at the bank branch in Rego Park, Queens, they found the boxes piled on the roof, next to a wide hole through which, it appeared, thieves had broken into the vault over the weekend.

The full extent of the theft remained unclear; the vault held not only safe deposit boxes but also teller’s cash, the bank said in a statement on Monday evening. The branch is expected to remain closed for several days, the statement said, and the bank will “keep our customers informed as to whether or not their safe deposit boxes were affected by the burglary.”

Outside the bank on Woodhaven Boulevard, caution tape roped the front doors as customers arrived to see if their belongings had been taken. Dozens of pilfered boxes had been left piled on the roof, according to the police, next to a makeshift plywood scaffold that appeared to have been constructed over the hole.