PIEDMONT (CBS SF) — A gas leak was blocking traffic in Piedmont Thursday afternoon.

Alameda County authorities alerted at 12:37 p.m. of a gas main break at the intersection of Highland Ave. and Moraga Ave.

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There were no evacuations necessary at this time, according to the alert.

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Traffic along Highland Ave. was blocked between Moraga Ave and Park Way. PG&E estimates the repair will take three to five hours.

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There was no word on what caused the leak.