Towsley Fire – Los Angeles County Fire Department officials responded to a brush fire reported Thursday on the Old Road in Newhall, south of Calgrove near Towsley Canyon, officials said.

UPDATE:Los Angeles County fire officials say the #TowsleyFire is at 50 acres, and containment for the blaze is at 85 percent. Residents should not be alarmed about excessive smoke, fire officials said, as there were no significant flare-ups today.

UPDATE: 9 p.m. Fire officials are reporting that the fire is now at 50 acres and 65 percent contained. Fire officials are planning to work throughout the night to fight the fire.

UPDATE: 5:40 p.m. The Towsley Fire is now at 50 percent containment with crews working through the night.

UPDATE: 4:40 p.m. The fire is holding at 20 acres with 20 percent containment and forward progress stopped.

UPDATE: 4:05 pm. The brush fire has grown to 20 acres with 10 percent containment, according to LACoFD.

UPDATE: 3:40 p.m. #KHTSNews was on scene while one man was taken into custody near where the fire started, across The Old Road from Field of Fire Paintball Adventures.

Deputies on scene indicated the man was being detained with respect to the investigation into the Towsley Fire, but officials have not confirmed whether the man is suspected of causing the fire. The man taken into custody was a white male in his 20s.

No other information is being released at this time with respect to the investigation.

UPDATE: 3:20 p.m. – The fire is now at 8-10 acres with 15 structures along the Old Road potentially threatened, fire officials said.

The Old Road Post Office and paintball facility have been evacuated, according to a tweet by Santa Clarita Sheriff’s officials.

UPDATE: 2:50 p.m. – All lanes of the 5 freeway have been re-opened, The Old Road remains closed between Gavin Canyon and Calgrove, according to CHP.

UPDATE: 2:40 p.m. – The brush fire has grown to at least 8 acres, with 3rd alarm called, said fire officials.

UPDATE: 2:12 p.m. – The fire is at 3-5 acres with 1 outbuilding involved, according to LACoFD officials.

The fire was reported at 1:39 p.m. at the 23900 block of the Old Road in Newhall, and was burning 1 acre uphill when firefighters arrived on scene, said Inspector Joey Marron.

All lanes of the 5 freeway are closed, said CHP Officer Adam Tondreau.