A gunman is in custody after opening fire on police as they were serving a drug warrant in Philadelphia, wounding six officers and triggering a standoff that extended into the night, authorities said.

Investigations are continuing into a shooting in Dublin last night.

A research assistant has shot and killed four staff members at a university in central Turkey, the university's president said.

Latest: Belgian police sealed off part of a Brussels suburb on Thursday and searched two apartments, warning residents to stay inside following witness reports that an armed man could be at large.

An armed man gunned down a new village police chief and then killed two employees in a nearby nursing home, where he later was found dead, a sheriff in Ohio said.

The gunman who shot and killed a police officer on the Champs-Elysees in Paris was detained in February for threatening police and then freed.

A man has told a Kildare murder trial that he witnessed his best friend being shot dead by a masked gunman on a bike.

A suspect in the gun attack on police in the heart of Dallas told officers he was upset over recent police shootings of black men and wanted to kill white people, particularly police, according to officials.

Law enforcement officials have given the base the all clear.

Killer said he had explosive vests and car rigged with bombs

A gunman has killed at least 50 people in a gay nightclub in Orlando, Florida, in the deadliest mass shooting in American history.

A former University of California graduate student killed his estranged wife in Minnesota before carrying two semi-automatic pistols and a grudge back to Los Angeles, where he gunned down a young professor he once called a mentor before killing himself.

A gunman fired shots early yesterday into a small crowd attending an open air concert organised by a local motorcycle club, killing two people and wounding 11 others before shooting himself to death, police said.

A survivor of the Dunblane massacre has told how she both hates and pities gunman, Thomas Hamilton, 20 years after the shooting.

Seven people, including a 14-year-old girl, have died after a gunman opened fire at random in a western Michigan city, US police said.

California gunman Syed Rizwan Farook had been in contact with known Islamic extremists on social media, a US intelligence source has said.

A gunman killed three people including a policeman in a rampage at a Planned Parenthood clinic in the US state of Colorado.

Latest: A gunman who opened fire at a Planned Parenthood clinic in the US state of Colorado is in custody.

CCTV footage has emerged showing the moment a gunman opened fire on a pizzeria in central Paris last Friday night.

All departures and arrivals at San Diego International Airport in California have been stopped.

A student singled out by Oregon college gunman Christopher Harper-Mercer as the “lucky one” to survive and deliver a package to police has spoken for the first time about the massacre.

The 26-year-old gunman who opened fire on fellow students in his college English class, killing nine people, was an army boot camp dropout who studied mass shooters before becoming one himself.

One day after the on-air killings of reporter and a cameraman shocked millions across the country, the grieving staff at WDBJ-TV came together for an emotional broadcast of its ‘Mornin’ show.

A drunken gunman shot dead three members of the same family in a travellers’ camp in north-east France yesterday before killing a police officer who arrived on the scene.

France awards Legion d’honneur as father denies gunman is terrorist.

Three Americans say they relied on gut instinct and a close bond forged through years of friendship as they tackled a heavily-armed man on a train speeding through Belgium.

Three people have been injured, two of them critically, in a shooting on a high-speed French train travelling from Amsterdam to Paris.

A group of gunmen broke into a discount clothing store near Paris yesterday, trapping 18 people inside for hours, before fleeing and prompting a manhunt throughout the area, police said.

A 29-year-old man was hailed a hero after bravely overpowering a gunman during a hostage incident in Clare in which a weapon was discharged.

Sydney gunman Man Monis was a self-obsessed fantasist who grew increasingly defiant as he edged closer to launching his deadly attack, an inquest has heard.

A man on trial for fraudulent bankruptcy opened fire in Milan’s courthouse, killing his lawyer, a co-defendant and a judge before being captured as he tried to flee on a motorbike, officials said.

A man has opened fire in Milan’s courthouse, killing a bankruptcy judge and reportedly hitting at least one other person, Italy’s ANSA news agency said.

A student pepper-sprayed a lone gunman who had already killed one man at a US university while he paused to reload, helping to prevent more deaths, police have said.