The police arrested four people in two digital arrest cases in Southwest Delhi in which a senior citizen and a graphic designer were defrauded of Rs 32 lakh and Rs 2 lakh, respectively, said Deputy Commissioner of Police Surendra Choudhary on Thursday. The first fraud occurred on October 14, when a 78-year-old man from Vasant Vihar allegedly received a call from one Nitin Kumar, who claimed to be a FedEx employee from the Andheri East branch in Mumbai.