HAMILTON -- A township woman was kidnapped from her home at gunpoint Thursday night and driven around for hours while three male captors made ransom calls to her husband.

The 33-year-old woman's ordeal ended over five hours later when she was dropped off in Bucks County, Pa., physically unharmed, Hamilton police said.

No ransom monies were paid, and police were still searching for the gunmen Friday, police Detective Sgt. Brian Schroeder said.

The incident began at 11 p.m. Thursday when the woman's husband called 911 and told police that his wife had called him and said she believed someone was breaking into their home.

The 35-year-old husband rushed home and found his wife missing, police said.

Then the husband started receiving ransom demands from the kidnappers. Police did not elaborate on the amount of money demanded.

Schroeder said the inbound ransom calls came from blocked numbers.

After numerous calls to the husband, the woman was released in Bristol Township, Pa., police said. Police there found the woman in the area of Green Lane at about 4:30 a.m.

The woman later told Hamilton police that the kidnappers - masked men holding handguns - forced their way into her home and demanded cash.

When she told them she did not have any cash, they took her and called her husband, making the ransom demands.

Schroeder said detectives have not found any obvious reasons why the kidnapers thought the couple could pay a ransom.

During the overnight investigation, the Mercer County Homicide Task Force and the FBI assisted police.

Anyone with information about the incident can call Hamilton Detective Sal Vaccaro at 609-689-5825 or the Hamilton police tipline at 609-581-4008.

Kevin Shea may be reached at kshea@njadvancemedia.com. Follow him on Twitter@kevintshea. Find NJ.com on Facebook.