On 18 April 2026, a mass shooting took place in the Demiivka neighborhood of the Holosiivskyi District of Kyiv, Ukraine, when a man opened fire on his neighbours and passersby in the street before going inside a supermarket, where he took hostages before being shot and killed by the police in a shootout. Eight people, including the perpetrator, were killed, and thirteen others were injured.

The perpetrator was identified as 57-year-old Dmytro Vasylchenkov, a Russian-born Ukrainian citizen. Two responding police officers were charged with official negligence for allegedly failing to properly confront Vasylchenkov.

At 4:32 p.m., police received a call about a dispute between neighbours in the Demiivka area of Kyiv's Holosiivskyi District. Vasylchenkov was initially armed with a rubber bullet pistol and fired shots with it at a neighbour. Vasylchenkov then armed himself with the carbine he used in the attack, and shot a man, a woman, and a young boy. Two police officers, who were aware that a shooting had taken place, arrived on scene after Vasylchenkov went back into his apartment and set it on fire. The young boy asked the police officers to treat his father, and then Vasylchenkov emerged from his apartment and opened fire on the wounded victims, the police, and other people in the vicinity.

Approximately ten minutes after leaving his apartment, Vasylchenkov entered a Velmart supermarket where he took hostages and barricaded himself inside and fired additional shots inside the store. Police established contact with Vasylchenkov inside the store and negotiated with him for approximately 40 minutes. Police described his behavior as "chaotic" and noted that he made no specific demands. After negotiations failed, police stormed the supermarket. Vasylchenkov was killed in the ensuing shootout following an official order to "eliminate him". One hostage was killed during the standoff and the four remaining hostages were successfully rescued by the police.

The mayor of Kyiv, Vitali Klitschko, initially said that six people were killed, including the gunman, and 15 others were injured, but a woman who was critically injured later succumbed to her injuries. Among the injured were a 12-year-old child and a 4-month-old child, the latter who lived in a neighbouring apartment to Vasylchenkov and suffered carbon monoxide poisoning from the fire. Eight people remained hospitalized by 19 April. On 20 April, Klitschko reported that a critically injured man died from his injuries, raising the death toll of victims to seven and that four of the injured remained in intensive care.

One of the murdered victims was identified as Igor Savchenko, a guitarist for the rock band "Druhe Sontse". The critically injured man who died two days after the attack was identified as 72-year-old Oleksandr Hryhorovych, and he was credited with shielding a wounded boy with his body before he was shot.

The shooter was identified as 57-year-old Dmytro Vasyliovych Vasylchenkov (Ukrainian: Дмитро Васильович Васильченков; 21 April 1968 – 18 April 2026), a Ukrainian citizen born in Moscow, Russia. Vasylchenkov served in the Armed Forces of Ukraine from 1992 to 2005 as a motor transport soldier primarily in Odesa Oblast. In 2007, Vasylchenkov moved to Russia and lived in Ryazan, but in 2017 he returned to Ukraine and lived in Bakhmut before eventually moving to the Holosiivskyi District of Kyiv.

Two Kyiv police officers were suspended after video allegedly showed them fleeing from Vasylchenkov rather than confronting him as they were among a group of civilians. Minister of Internal Affairs Ihor Klymenko described the actions of the police as "shameful" and "unworthy behavior", and wrote that an investigation into them was underway.[19] However, Klymenko also wrote that it was "not entirely correct to make generalisations about the entire police only by the actions of two employees".[20] The head of Ukraine's Patrol Police, Yevhen Zhukov, resigned in response to the video, stating that he believed it was "fair" due to the "shameful" actions of the police officers.[21]

On 20 April, prosecutor general Ruslan Kravchenko said that the two police officers had been charged with official negligence, a charge which could see them face up to five years in prison. The State Bureau of Investigations (SBI) said that the police officers were aware that there was an armed man and a threat to people's lives when they arrived on scene, and that they failed to use their service weapons to confront Vasylchenkov and instead fled from him. The SBI also said that investigators had requested a court to order pre-trial detention for the two police officers.[6] The two police officers were placed into custody at the order of Pecherskyi District Court the next day and received bails of ₴266,240 each, and the following day both officers posted bail. According to police, Vasylchenkov had a tendency for conflicts and would periodically quarrel with his neighbors. In 2024, criminal proceedings were initiated against Vasylchenkov under Article 125 of the Criminal Code ("causing light bodily harm") following a fight in a store. The case was dismissed upon both parties reaching a settlement. The court decision states that Vasylchenkov was born in Kyiv, not Moscow, contrary to the statements of law enforcement officials.The Guardian cited reports saying he had made anti-Ukrainian and antisemitic posts on social media, wished that Russia had captured Bakhmut earlier, denied Ukraine's right to exist, and fantasised about "cleansing" society using the methods of Adolf Hitler.

The Security Service of Ukraine said that it was investigating the attack as an act of terrorism. Minister of Internal Affairs Ihor Klymenko said that the motive for the attack and the actions that police officers took during the attack were under investigation. The weapon used in the attack was identified as a KelTec SUB-2000 carbine that was legally registered. Klymenko also said that the attacker's mental state had been "clearly unstable" and said the investigation would include how he had obtained the medical certification needed to renew his firearms license.

President of Ukraine Volodymyr Zelenskyy said that Vasylchenkov had been "prosecuted" in the past by police and that Vasylchenkov's electronics and personal connections were being investigated by authorities in the aftermath of the attack. Klymenko disclosed on 20 April that Vasylchenkov recorded his voice during the attack, and that investigators were having trouble discerning what he said. Klymenko said that Vasylchenkov had a habit of recording himself speaking to people and sometimes of him talking to himself. Law enforcement attributed his collection of recordings to a plan by Vasylchenkov to prove his "innocence" in the case of a trial against him because of an ongoing dispute with his neighbour, and that it was possible that when Vasylchenkov retrieved the firearm used in the attack he had not initially planned on opening fire with it.

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