The DGCA will probe the incident.
This was the second such incident on Thursday of a plane returning to the Delhi airport due to technical issues.
The official said the IndiGo flight from Delhi to Udaipur, operated by an A320 neo aircraft, did an air turnback after there were vibrations in engine 2.
The plane landed safely and has been grounded. The DGCA will conduct a detailed probe into the incident, the official added.
In a statement, the airline said its Airbus flight 6E-6264 from Delhi to Udaipur returned back to Delhi due to a technical snag.
"All passengers were accommodated on another aircraft which operated to Udaipur," it added.
Earlier in the day, a
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