Prime Minister Yingluck Shinawatra has been accused of abuse of authority in helping Pol Gen Pongsapat Pongcharoen, the Pheu Thai candidate, campaign in the lead-up to the March 3 Bangkok governor election, Bangkok election committee chairman Taweesak Tuchinda said.
The accusation was made in a petition filed by Suriyasai Katasila, a core member of the Green Group.
The petition said Ms Yingluck helped Pol Gen Pongsapat campaign at the 1st Infantry Regiment, where she was greeted by high-ranking army officers.
Pol Lt-Gen Taweesak said the Bangkok election committee agreed at its meeting today to accept Mr Suriyasai's petition for investigation.
The Bangkok EC also accepted another petition filed by former senator Ruangkrai Leekijwattana accusing core members of the Democrat Party of helping MR Sukhumbhand Paribatra campaign in violation of Section 57 (5) of the Local Election Act.
The committee would examine the two petitions quickly and hoped to forward the results to the Election Commission by April 2.
If the investigation was not finished by then, the Bangkok EC could seek two extensions of 15 days each, he said.