Firefighters responded to a small brush fire Wednesday morning in Calabasas.

The fire was reported at about 9:30 a.m. near Mulholland Highway and Malibu Canyon Road. At least one water-dropping helicopter was making runs on the flames.

Details about how the fire started were not immediately available.

No buildings appeared to be under immediate threat, but there are power lines in the area.

Refresh page for updates on this developing story.

The fire started after three major fires last week — one in Ventura County and two in Riverside County.