The 35-year-old victim was reportedly attacked near his house by two men and has been admitted to hospital. The motive of the attack is still not clear.
Last week, Salouni - a former call centre employee from Manipur - was severely beaten up by five men in a road rage case. The police took a badly injured Salouni to the All India Institute of Medical Sciences or AIIMS, where he was declared dead.
Activists from the North East have alleged that his death was a "hate crime" and another in a long list of cases of racial discrimination in the capital.
Earlier this year, Nido Tania, a 20-year-old student from Arunachal Pradesh died after being beaten with iron rods and sticks by a group of men in a market in Delhi's Lajpat Nagar, not far from where Shaloni died.
Nido's death had led to street protests and a national debate on discrimination against Indians from the North East.