"Our preliminary probe (has) revealed authorities had marked that limit with a white strip outside the booth,and the press conference was outside that limit," said a senior officer of the Detection of Crime Branch of Ahmedabad's police, which initiated the investigation on Thursday.
The model code for elections prevents canvassing within 100 metres of polling stations.
Complete Coverage: Lok Sabha Election 2014
First ever FIR, won't forget this day: Modi
'Why the haste to file FIR against Modi?'
'Progress is for big people, not small people'
The city of 1.637 million Modis
Modi hungry for power, already assumes himself as PM: Sonia