What Triggered the Deadly Sri Lanka Prison Riot? Inside the Negombo Clashes That Left 25 Dead and 100 Injured

• 25 dead, about 100 injured in one of Sri Lanka’s deadliest prison riots.

• Rival inmate groups reportedly clashed over alleged drug trafficking.

• Investigation underway into how prisoners obtained weapons and security failures.

A violent two-day riot at Sri Lanka’s Negombo Prison has left at least 25 people dead and about 100 injured, turning it into one of the country’s deadliest prison disturbances in years and putting a harsh spotlight on prison security, overcrowding and the criminal networks believed to operate behind bars.

Officials say the trouble began with clashes between rival groups of inmates and quickly spiraled into a deadly confrontation that prison staff could not contain, forcing police and military support to be called in and triggering an investigation into how prisoners got hold of weapons.

What Triggered the Clashes?

The unrest at Negombo Prison, about 35 kilometres north of Colombo, began on Sunday when two groups of inmates, convicted prisoners serving long sentences and others being held in temporary detention, clashed inside the facility.

Prisons Department spokesman Chamika Gajanayake said investigators believe the violence may have been tied to drug trafficking inside the prison. However, officials have not shared more details while the inquiry is still underway.

Tensions reportedly flared again on Monday morning during breakfast distribution. “The fight broke out when the prisoners were being served breakfast,” Gajanayake told reporters near the prison. Negombo Prison holds about 2,400 inmates, according to the Department of Prisons.

How Did the Violence Escalate?

Prison officers first tried to step in and separate the rival groups, but the situation quickly got out of hand. Instead of calming down, prisoners allegedly turned on prison staff, chasing officers toward the prison gates and trying to break out of the facility.

“Prison officials intervened to stop the clash, but the prisoners then chased the officials to the gate of the prison and attempted to break out,” Gajanayake said. The violence on Sunday left two prisoners dead and dozens injured. But the second round of clashes on Monday was far deadlier.

Authorities said another 23 people, including six prison officials, were killed, bringing the total death toll to 25. About 100 people were injured in the unrest. Dr. Pushpa Gamlath, director of Negombo Hospital, said many of the injured had serious wounds. “About 100 injured people were brought to this hospital. Some had gunshot injuries, cuts, and bruises,” Gamlath told Reuters. She said 18 injured inmates were later transferred to another hospital for further treatment.

Why Did Authorities Lose Control?

A few factors appear to have made the situation much harder to contain. For one, officials were dealing with unrest inside one of Sri Lanka’s larger prisons, where thousands of inmates are held.

Second, Justice and National Integration Minister Harshana Nanayakkara confirmed that prisoners managed to get hold of weapons during the clashes, which made the violence far more dangerous.

“I know that some weapons fell into the hands of the prisoners, but at the moment I don’t know the exact number,” Nanayakkara said after visiting the prison. As prison officers struggled to regain control, authorities brought in police riot squads and Special Task Force units to help contain the violence.

The military was also placed on standby, while the Sri Lanka Air Force sent helicopters and surveillance drones to monitor the prison compound. By Monday evening, soldiers and armoured vehicles had surrounded the prison as security forces secured the area.

Army spokesman Brigadier Waruna Gamage said the military had been asked to assist police if needed. “The military has been requested to provide support to the police, but at the moment they are on standby,” Gamage told Reuters.

Was Drug Trafficking Behind the Riot?

Investigators have not yet released their full findings, but prison authorities believe the clashes may have been linked to rival inmate groups involved in drug trafficking inside the prison. Gajanayake pointed to drug-related activity as the suspected cause of the violence, but said officials were not ready to go into detail while the investigation continues.

Sri Lanka’s prison system has long struggled with overcrowding, gang rivalries, narcotics smuggling, and organised criminal networks operating behind bars. Authorities are now expected to examine whether those problems played a direct role in the violence in Negombo.

Has Sri Lanka Experienced Similar Prison Riots Before?

Sadly, this is not the first time Sri Lanka has seen deadly prison unrest. In November 2020, a prison riot in the country left 11 inmates dead after clashes over COVID-19 restrictions. Earlier, in 2012, a riot in Colombo killed 27 people.

The Negombo violence now ranks among the deadliest prison disturbances in Sri Lanka’s recent history and is likely to bring renewed scrutiny to prison management, inmate security, and the growing influence of organised crime inside correctional facilities.

What Happens Next?

Justice Minister Nanayakkara said the prison has now been brought back under government control, and investigations are underway. Officials are expected to determine what sparked the clashes, how inmates got hold of weapons, whether criminal groups were involved, and whether security failures allowed the violence to spiral into one of Sri Lanka’s worst prison riots in years.

Although order has been restored, the scale of the bloodshed has exposed long-standing weaknesses in Sri Lanka’s prison system and renewed calls for reforms to improve security and crack down on organised crime behind bars.