In a significant decision, the Supreme Court agreed on Monday to examine whether Facebook's access to details of calls, messages, photographs and documents exchanged by 160 million Indian users of WhatsApp violated citizens' right to privacy.

The court sought responses from Facebook, WhatsApp, Centre and Telecom Regulatory Authority of India (Trai), and also sought the assistance of attorney general Mukul Rohatgi keeping in mind the constitutional question raised by two petitioners.