The incident happened at around 11.30 AM when victims were returning home at Bhatpara area under Jagatdal police station of Barrackpore sub-division with the cash when unknown miscreants on bikes followed them and tried to snatch the money from them, they said.
"They first tried to snatch the money, but when the victims resisted they opened fire and took away the bag from them and fled," a police officer said.
An FIR has been registered with the Bhatpara Police Station and police have launched a search for the miscreants, they added.