A 19-year-old man was arrested on Sunday for allegedly stabbing a tempo driver to death along with three others after the victim's vehicle brushed past a pet dog in Dwarka's Mohan Garden area, the police said.

The dog belonged to one of the four accused, they said. The arrested accused was identified as Karan Arora, they added. The police said the incident, in which the deceased's elder brother was also injured, took place on the intervening night of Friday and Saturday. Arora is a neighbour of main accused Ankit and Paras, who were brothers, and they were very close friends, a senior police officer said, adding Arora was to appear for his class 12 examination from open board of Delhi.