Earlier in the day, an FIR was registered against four unknown people and one accused was also arrested from Rajasthan.
Swaraj added that she would also reach the hospital the couple is admitted in.
In a tweet, she said, "I have just seen this. I have asked for a report from the State Government. My officers will reach them in the hospital."
The duo was reportedly seriously injured in the attack and is currently admitted in a hospital in Delhi.
The Swiss pair has alleged that they were followed by a group of people while ambling near the railway station.
Later, the group started passing comments at them and forced the couple to stop and take selfies. The group's harassment soon turned violent and they suffered critical injuries. (ANI)