As many as 670 Tucson Electric Power customers lost power midday Friday after a truck snagged a cable line south of downtown, a company spokesman said.
About 60 customers were still without power Friday evening, and workers were expected to continue repairs throughout the night, spokesman Joe Barrios said.
The outage began about 11:30 a.m. when a truck headed north on South Sixth Avenue just south of 22nd Street caught a cable line, Barrios said.
The snag broke four power poles and damaged about 12 of the crossarms on other poles, he said.
It also caused traffic delays.
Barrios expected at least one lane of South Sixth Avenue to continue to be blocked due to the repair work into Saturday.