Prime Minister Manmohan Singh arrived in New Delhi on Wednesday night after a three-day visit to Japan.

Singh was in Japan to attend G-8 summit on whose sidelines he also met US President George W Bush and discussed progress on the Indo-US nuclear deal.

During his stay in Japan, he met leaders of various countries including Russia, Britain, Germany, France and host Japan.

India is part of O-5 countries also called as Outreach Countries, invited to the G-8 summit. India has been attending the G-8 outreach meetings from 2003.