As many as 13 people living in Chauki village, near Hotel North Park, were allegedly poisoned and looted on Tuesday night.
The victims included two children and six women and all hail from Rajasthan. All of them work as labourers.
"Two Bihar residents took some space from us to sell cigarettes, tea and candies in the area about a week ago. On Tuesday evening, one of them offered the victims sweets allegedly laced with poison. The accused said he had observed a fast and the sweet was a 'prasad'," said Tara, uncle of Ramesh, 10, and Pappu, 13.
Both Ramesh and Pappu had to share the same bed due to unavailability of vacant beds in the hospital.
The victims used to stay in three dwellings. "We fell unconscious after eating the sweets and they looted us. I lost Rs 3,000. We are not aware of their names," said Charan Singh, 40, who was admitted to the hospital.
"All of them fell unconscious after taking the "poisoned" sweets. Their neighbours informed the police control room. We reached there and got them admitted to General Hospital, Sector 6," said SHO of the Chandimadir police station inspector Satish Kumar. Kalka ACP Krishan Hooda also visited the spot.
The victims have been identified as Roshni, 30; Kammo, 40; Aarti, 25; Paapu, 13; Ramesh, 10; Gulab, 20; Jagdish, 40; Raju, 35; Shanti, 25; Suman, 35; Mallah Bai, 65; Ram Chander, 35; and Charan Singh, 40.
"They are out of danger. The chemical analysis will determine what kind of substance was added into the sweets," said Dr Rajesh Kumar, who treated the victims.
"We have registered the case under Section 328 (for giving poison) and Section 380 (for theft) of the IPC. Cash and jewellery worth Rs 1 lakh has taken place in the case. We are investigating the case," said the SHO.