Nigerian kidnappers have abducted an American missionary from Seattle and have demanded a ransom for her release.

Police in Nigeria as well as American officials are working together to bring back the missionary safely.

The kidnappers first demanded around $300,000 for the safe return of Rev. Phyllis Sortor whom they kidnapped on Monday, according to the Associated Press. Five men took her Monday morning local time after she returned from a meeting. The Seattle missionary is part of the Free Methodist Church and was working in Nigeria's Kogi state.

Kogi State Police Commissioner Adeyemi Ogunjemilusi visited the site of the abduction with other police officials on Wednesday. Rev. Sortor was taken from the Hope Academy compound in Emiworo.

The general concept here is that Americans have money. So they thought that by kidnapping her, they can get money," Ogunjemilusi said. "We don't think it's a good idea for the family to negotiate with the abductors on the ransom because we are sure we will find her."

Although the initial amount wanted was $300,000, on Wednesday the kidnappers contacted a church official in Nigeria and lowered their demands to $150,000, reports the Los Angeles Times. The fact the kidnappers are negotiating a ransom suggests they could possibly not be related to Boko Haram, which are based farther up north of the country.

Rev. Sortor is a 1964 graduate of Seattle Pacific University, which is associated with the Free Methodist Church. They lamented her kidnapping in a statement.

"We are shocked and saddened by the kidnapping of Seattle Pacific University alumna Phyllis Sortor in Nigeria," the university said, adding that she "has dedicated her life to serving others overseas."

"We are proud of her untiring service to God and the people of Nigeria, and are earnestly praying for her safety and immediate release," it added.

Family and friends describe Rev. Sortor as a good woman who wants to help others, according to the AP. She was born in Mozambique where her parents were missionaries

"She has a real passion for missionary work and helping people in need," said John Van Valin, an old friend. "We're just really saddened to hear the news, but we're praying a great deal. There are people all around the world who are praying for her."