UPDATE: All power was restored to customers as of 5 p.m. Monday, an Edison spokewoman told Patch.
A power outage Monday afternoon left more than 2,500 customers in Monrovia and Duarte without power, a Southern California Edison spokeswoman said.
The outage began shortly after 2 p.m. when two circuits went down, Edison spokeswoman Nancy Rodriguez Casanova said.
The signal at Myrtle Avenue near the 210 freeway lost power and a live wire was reported on Mountain Avenue, according to police scanner reports.
Rodriguez Casanova did not know when power would be restored.
"They're actually still trouble shooting it right now," she said shortly before 4 p.m.
The outage map on Southern California Edison's website lists two outages in Duarte affecting a total of more than 150 customers. The map does not list any outages in Monrovia.
Edison lists "equipment failure" and "equipment problems" as the causes of the Duarte outages.
"We are in the process of completing repairs," its website reads.
Patch will update this story when more information is available.