A 42-year-old carpenter was arrested for hammering a beautician and her daughter to death and injuring her son in Tilag Nagar area of west Delhi.
Police said that the arrested has been identified as Balvinder Singh, a resident of Mandoli Road, adding that Singh is also a relative of both victims.
On May 21, beautician Jasbir Kaur (36) and her daughter Prabhjot Kaur (14) were found dead while Jasbir's son Jaspal was found injured at their residence.
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According to police, Balvinder Singh, who took a loan of Rs 1.5 lakh from a person to meet his expenses, was in the habit of drinking and had hatched a plan to rob the victims' house and then kill them to clear his debt.
On the night of May 20, he attacked Jaspal, Jasbir and Prabhjot with a hammer and decamped with jewellery and cash, a senior police officer said.
During investigation, it was noticed that Balvinder did not participate in the cremation, he said.
Balvinder was later arrested and the hammer, blood stained clothes, and a mobile were recovered from his possession, the officer said.