PHILADELPHIA (CBS) — Crews are on the scene of an underground fire in Center City.

Crews were called to the scene at about 5:45 p.m. Thursday to 21st and Walnut Streets.

CBS 3 is told about 400 people are without power.

The fire has been placed under control, CBS 3 is told.

There are no reports of injuries at this time.

Stay with CBSPhilly.com for the latest on this developing story.