"BJP has a poor understanding about the law of the country. What should be done and not done is up to the Election Commission to decide," Union Minister Salman Khurshid said.
Responding to a question, he told reporters that Rahul had done nothing that was in violation of law.
"It's only where there are cognisable offences that FIR are registered. If there is no cognisable offence, no FIR is lodged.
BJP leader Venkaiah Naidu had earlier in the day said that Rahul, the Congress candidate from Amethi, had gone to EVM enclosures during polling hours but there was no action against him unlike registration of a case against Narendra Modi and Chandrababu Naidu for speaking to the media beyond the permissible limits of a polling booth.
Naidu cited media reports to say that Rahul inspected EVMs in some booths during polling yesterday.