A man was killed while two of his brothers sustained injuries in a knife attack in southeast Delhi’s Govindpuri area, police said on Thursday.

Police said four men have been arrested over the attack, which occurred at Machhli Market at Govindpuri area Wednesday night.

According to police, the three brothers – identified as Mohammad Azad (28), Mohammad Irshad (25) and Mohammad Saddab (24) – slapped Shivam over a minor issue at Navjeewan Camp in Govindpuri at around 9.30 pm.

Shivam, after getting hurt, approached his friends Sunny alias Laalu and Saurabh, who were drinking alcohol at a nearby park. The trio along with one Junaid, attacked all three brothers with a butcher knife leaving them injured. All the accused fled from the scene.

By the time police reached the spot, Azad, Irshad and Saddab had been taken to AIIMS hospital where doctors declared Azad dead. His brothers were later admitted to Madan Mohan Malviya Hospital.

Police said that they have arrested Junaid from Govindpuri while Shivam, Laalu and Saurabh were arrested from Dakshinpuri.

Police also said except Shivam, all three accused have a previous criminal record. Further interrogations were underway.

A Delhi court on Thursday dismissed the appeals filed by Aam Aadmi Party (AAP) leaders Satyendar Jain and Raghav Chadha in a criminal defamation complaint lodged by Delhi BJP leader Chhail Bihari Goswami.

Special Judge M K Nagpal dismissed their appeal against a magisterial court’s order summoning them as accused in the matter.

The judge said the order passed by the trail court was “perfectly correct and legal on facts as well as in law”.

Goswami filed the complaint before the metropolitan magistrate accusing Jain, a former Delhi minister and sitting MLA, and Chadha, a Rajya Sabha MP from Punjab, of having made defamatory remarks against him over North Delhi Municipal Corporation (NDMC) funds. Goswami was the chairperson of the NDMC Standing Committee.

He alleged the two AAP leaders made the remarks to “lower the moral and intellectual character of the complainant in the eyes of the general public”.

A pupil shot and killed a fellow student at a German school on Thursday, authorities said, in the latest in a series of youth murders in the country. Police and prosecutors in the southwestern city of Offenburg said they suspected a “personal motive” in the dispute between the two minors.

The assailant was arrested in a classroom at the school where he fired on his fellow pupil of the same age. The victim later died of his wound in hospital.

Around 300 emergency responders arrived on the scene and 180 pupils were evacuated to a neighbouring athletics hall and picked up by their parents.

Germany, where gun crime is relatively rare, has seen a series of deadly incidents involving youths in recent months.

German police arrested two teenagers and seized a pair of “apparent toy weapons” on Wednesday after evacuating a high school in Hamburg over a security threat.