Three inmates were killed on Sunday and another was wounded after escaping from jail in a southern Philippine island that is the stronghold of Islamist militants, police said.
The casualties were among 14 prisoners who escaped from a police station jail in war-torn Jolo, authorities said.
Jolo is a base of the Abu Sayyaf kidnap-for-ransom group and some of the inmates were linked to the militants, according to provincial police chief Senior Superintendent Mario Buyuccan.
"They cut the bars of the jail and jumped from the second floor to the roof of the municipal hall building next door. Our troops responded and the inmates were killed and wounded in hot pursuit operations," Mr Buyuccan told AFP.
"Some inmates are associated with the membership of the Abu Sayyaf."
The injured inmate was recaptured while soldiers and policemen were chasing the remaining 10 escapees. The jail had a total of 32 inmates mostly facing drug charges, Mr Buyuccan added.
The Philippines frequently has mass escapes from prisons which are usually overcrowded, poorly maintained and inadequately guarded.
In the country's biggest jailbreak, more than 150 inmates escaped a prison in the southern Philippines in January after about a hundred gunmen stormed the facility.
In May, Islamist militants waving black flags of ISIL went on a rampage in the southern city of Marawi and freed 100 inmates from two jails there.
The incident triggered an ongoing US-backed military offensive involving air strikes and artillery barrages to flush out the militants.
Mr Buyuccan said there was no connection between Sunday's jailbreak and the fighting in Marawi, which had killed more than 500 people.
From Europe to the Middle East, economic success brings wealth - and lifestyle diseases
A rise in obesity figures and the need for more public spending is a familiar trend in the developing world as western lifestyles are adopted.
One in five deaths around the world is now caused by bad diet, with obesity the fastest growing global risk. A high body mass index is also the top cause of metabolic diseases relating to death and disability in Kuwait, Qatar and Oman – and second on the list in Bahrain.
In Britain, heart disease, lung cancer and Alzheimer’s remain among the leading causes of death, and people there are spending more time suffering from health problems.
The UK is expected to spend $421.4 billion on healthcare by 2040, up from $239.3 billion in 2014.
And development assistance for health is talking about the financial aid given to governments to support social, environmental development of developing countries.
Our legal columnist
Name: Yousef Al Bahar
Advocate at Al Bahar & Associate Advocates and Legal Consultants, established in 1994
Education: Mr Al Bahar was born in 1979 and graduated in 2008 from the Judicial Institute. He took after his father, who was one of the first Emirati lawyers
Indoor cricket World Cup:
Insportz, Dubai, September 16-23
UAE fixtures:
Men
Saturday, September 16 – 1.45pm, v New Zealand
Sunday, September 17 – 10.30am, v Australia; 3.45pm, v South Africa
Monday, September 18 – 2pm, v England; 7.15pm, v India
Tuesday, September 19 – 12.15pm, v Singapore; 5.30pm, v Sri Lanka
Thursday, September 21 – 2pm v Malaysia
Friday, September 22 – 3.30pm, semi-final
Saturday, September 23 – 3pm, grand final
Women
Saturday, September 16 – 5.15pm, v Australia
Sunday, September 17 – 2pm, v South Africa; 7.15pm, v New Zealand
Monday, September 18 – 5.30pm, v England
Tuesday, September 19 – 10.30am, v New Zealand; 3.45pm, v South Africa
Thursday, September 21 – 12.15pm, v Australia
Friday, September 22 – 1.30pm, semi-final
Saturday, September 23 – 1pm, grand final