LOS ANGELES - The twin earthquakes that rattled Southern California Sunday had a limited impact on bank operations.

Officials of BankAmerica Corp. reported that about 300 of their automated teller machines were temporarily out of service because of downed telephone lines; other institutions reported similar problems. But in most cases, full service was restored before the start of business Monday.

No Financial Data Loss Reported

Despite brief power outages in a number of areas in and around Los Angeles, no major financial institution reported any data loss resulting from computer systems' failure.

"The fact that it happened on a Sunday really neutralized the potential damage," said a spokesman for First Interstate Bank of California.

In the sparsely populated areas east of Los Angeles where the quakes hit hardest, several institutions reported structural damage to branches that would cause some closings this week.

However, most said they expected the branches to be back in full service by the end of the week.

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