Millions stretch for International Yoga Day

Indian Prime Minister Narendra Modi called yoga a "people's mass movement" as he took to the mat on Tuesday along with millions of others worldwide to celebrate the ancient practice.

Across India, sailors, soldiers, schoolchildren and bureaucrats bent and twisted their bodies from early morning at mass outdoor sessions to mark the second International Yoga Day.

Sessions were also held around the world including at the Sydney Opera House where colorful mats were spread outside the Australian landmark, while Afghans and foreigners gathered at the Indian embassy in Kabul.