SAN DIEGO (CBS 8) - Crews are still working to clean up a massive sink hole in Poway Friday.

It happened Thursday night, when a water main broke at Twin Peaks Road and Budwin Lane.

Authorities temporarily shut down traffic around the sinkhole as water flooded nearby streets. No homes were damaged.

Officials are still trying to determine what caused the rupture.

Neighbors say the street was re-surfaced earlier this week.