In pictures: Gandhi Salt March

1 of 7 On this day in 1930, Mahatma Gandhi set off on a march from Ahmedabad in Gujarat state to the coastal village of Dandi.

2 of 7 He was protesting at the British rulers' monopoly on salt production. It led to a campaign of civil disobedience.

3 of 7 His historic march is being re-enacted 75 years later by hundreds of followers, led by his great-grandson Tushar.

4 of 7 This time many of India's rulers are taking part, including the president of India's governing Congress Party, Sonia Gandhi.

5 of 7 But Tushar Gandhi says their message is essentially the same - to promote religious tolerance, brotherhood and peace.

6 of 7 He says it is a global message, and the event has attracted people who are keen to take part from around the world.

7 of 7 The followers aim to walk 380km (240 miles) in 24 days - just like Mahatma Gandhi.