A group of hikers lost in the dark on an Aiea trail used a whistle to signal fire rescue personnel tonight.

Honolulu Fire Department Capt. Kevin Mokulehua said the hikers were on the Aiea Loop Trail when they called the fire department at 6:34 p.m.

The party of two women, a teenage girl and a female toddler were unable to find their way back to the trailhead due to darkness, Mokuleha said in an email.

Fire personnel found the hikers at 7:21 p.m. and escorted them down the trail.

One of the hikers used a whistle to help HFD personnel to locate them, Mokulehua said.

No injuries were reported.

The Fire Department reminds hikers to “plan enough time to return from your hike to account for sufficient daylight.”