Three hostages being held by militants in the Philippines have appeared in a video pleading for their governments to meet the captors' demands.

On the day Canadian John Ridsdel, 68, was beheaded, a 20-million-peso (US$426,000) ransom had been raised for delivery to his Abu Sayyaf captors.

The Canadian Prime Minister Justin Trudeau condemns the killing of a Canadian hostage kidnapped by Islamist militants in the Philippines.

A soldier and eight Abu Sayyaf fighters have died after an attempt to free hostages held by the Islamist militant group, the Philippine army said.