Krause's family last heard from him when he called his wife Gina from South Africa to let her know he was on his way home to Bamako. The two have lived as missionaries in Africa for 25 years, the last 16 of them in Mali, a mainly Muslim country. Krause had served as a missionary pilot for the Nampa, Idaho-based Mission Aviation Fellowship until 2009 when the air service pulled out of Mali.
Jerry and Gina Krause stayed on. Many foreign companies and charities have left Mali since jihadist fighters swarmed over the north last year. France and several African nations sent troops this year when the Islamic fighters, allied with al-Qaeda, started to advance on Bamako, the capital.
"God knows where Jerry is," Gina Krause says, expressing certainty and her faith in a posting at the findjerry Web site. "I know I serve a God who can do the IMPOSSIBLE."
AP writer Barry Hatton in Lisbon, Portugal contributed to this report.