LONDONDERRY — Police say they responded to a mental health crisis at Kendall Pond Conservation Area Thursday evening.

It ended around 6 p.m., when they found a deceased woman, police Capt. Patrick Cheetham said.

He said police were notified about 2:30 p.m. that a 30-year-old woman from New Hampshire was “reported to be despondent.”

Cheetham said the woman was reported to have possibly been in possession of a firearm.

About eight Londonderry officers began a search of the Kendall Pond Conservation Area near the Windham town line after they located the woman’s vehicle there, he said.

The public was advised to avoid the conservation area.

After about two hours of searching, police called in the Southern New Hampshire Special Operations Unit, which included about 40 officers, Cheetham said.

A New Hampshire State Police helicopter and the Derry Police Department drone team also assisted with the search.

By about 6 p.m., officers found the woman dead. Her identity, town of residence and manner of death are not being disclosed at this time.

Immediate family has been notified, police said. The manner and cause of death will be released after an autopsy, according to authorities.