Philippines police have shot dead 17 prisoners as they stormed a jail in Manila to end a day-long stand-off.
A group of Islamic militants had snatched weapons from guards and killed three of them.
Police said they regained control of the prison building about an hour after starting the assault. Troops outside fired tear gas as teams of police commandos scaled the walls of the four-storey detention centre and overpowered the militants.
Five police officers were wounded in the assault.
At least three leaders of the Abu Sayyaf rebel group accused of involvement in high-profile kidnappings of foreigners were among those killed in the assault, police said.
Television reports said 300 policemen had stormed the building, where more than 400 prisoners, including 129 suspected Islamic militants, were detained.
Police say a core group of 10 suspected Abu Sayyaf members had been holding out since killing three guards in an escape attempt yesterday.
Police said Alhamser Limbong, alias "Kosovo"; Ghalib Andang, alias "Commander Robot"; and Najdmi Sabdula, alias "Commander Global", were among the Abu Sayyaf leaders killed.
Police said earlier that the uprising appeared to have been led by Limbong, who was accused of beheading an American hostage after a mass kidnapping from a Philippine beach resort in 2001.
Limbong had also been charged with carrying out an Abu Sayyaf bomb attack on a ferry near Manila last year that killed at least 116 people.
The one-legged Andang and Sabdula were accused of leading the kidnapping of 21 people from Malaysia's Sipadan island in 2000.