NEW DELHI: To check digital frauds, the government has disconnected 70 lakh mobile numbers so far involved in cybercrime or financial frauds, Financial Services Secretary Vivek Joshi said on Tuesday. Emerging from a meeting to discuss issues related to financial cyber security and increasing digital payment fraud, Joshi, who chaired the meeting, said banks have been asked to strengthen the system and processes in this regard. More such meetings would take place, he said.