Islamic militants in the Philippines have posted a video showing the beheading of a German hostage.
Jurgen Kantner was abducted from his yacht off Malaysia's Sabah state in November. His companion Sabine Merz's body was later found on the boat, according to BBC.
A deadline for a 30m peso; $600,000 ransom expired on Sunday.
Mr Kantner, 70, and Ms Merz had been abducted before. They were held for 52 days in 2008 by Somali pirates and were released after a ransom was paid.
The video, reported by the SITE militancy-monitoring group, shows Mr Kantner being killed by a knife-wielding man.