Election Commission: No abnormality in EVMs at all. Malfunction was in VVPATs. Factors responsible may include:

1. First-time use by polling staff; whereas they have developed expertise in managing EVMs

2. Extreme heat

3. Placement of VVPAT under direct light and mishandling during use.

EC conducts root cause analyses in such cases to improve for future, CNN-News 18 reported.