A complaint to the Election Commission charged Yingluck was trading food for votes. The commission's secretary-general, Suthipol Thaweechaikarn, said the preliminary investigation suggests she was not doing anything wrong on May 31 but more witnesses need to be examined, the Bangkok Post reported.
"Preliminary results from the investigation show it was not an act of intending to cook the noodles to give them to supporters because a noodle vendor was cooking when Ms. Yingluck arrived and she asked if she could help her with the cooking," Suthipol said.
Yingluck, sister of former Prime Minister Thaksin Shinawatra, is head of the Pheu Thai Party, which won 265 of the 500 parliamentary seats last Sunday. Several small parties have since agreed to work with Pheu Thai, giving it a majority of more than 300.