The Election Commission issued the notice to Ramdev and organisers of the Yoga camp after scrutinising the video footage of the event.
"Ramdev and organisers of Yoga Mahotsav have been issued a show cause notice by the Delhi Election commission for using the platform for political activity without prior permission from the authorities," Delhi's Chief Electoral Officer Vijay Dev told reporters here.
Asked why no notice was served on Modi, who addressed the gathering at the 'yoga mahotsav', Dev said no violation by the BJP leader was observed in the footage.
Modi had shared the dias with Ramdev and some other spiritual leaders and targeted Rahul Gandhi over his invocation of his family's sacrifices. Extending support to Modi, Ramdev had asked his supporters to help bring a "good leader" with "good intentions" to power.
In his address, Modi had complimented Ramdev for organising the event in which technology was utilised in a big way. The programme was transmitted to 600 districts simultaneously.