A portion of a tent being erected for yoga guru Ramdev's protest at the Ramlila Maidan in New Delhi collapsed on Tuesday morning due to rains, leaving four labourers injured.
Organisers said the tent collapsed due to rain.
The labourers suffered minor injuries, they said.
Ramdev is scheduled to sit on an indefinite protest from August 9 demanding that black money stashed away abroad should be brought back to the country.