ROWLAND HEIGHTS — Authorities remained tight-lipped Thursday about a break-in at a Rowland Heights bank branch earlier this month in which the contents of customers’ safety deposit boxes were stolen.

Burglars broke into the EastWest Bank, 17458 Colima Road, Aug. 6, FBI spokeswoman Lourdes Arocho said.

FBI investigators declined to release any further information regarding the crime, she said.

Los Angeles County sheriff’s officials declined to discuss the break-in and deferred all comments to the FBI.