The incident happened when some partymen hurled stones and eggs at a procession led by Panda after he inaugurated a drinking water project in the area in Kendrapara district, police said.
Panda was seen hit by a stone and he sat down on the ground surrounded by his supporters. Later police escorted the MP up to a chopper. Soon his supporters pelted stones at the other partymen. Immediate police intervention controlled the situation.
Panda, MP of Kendrapara, had allocated funds for the overhead water tank at Jatiparilo village under Mahanga Assembly segment represented by state's Health and Family Welfare Minister Pratap Jena.
While local BJD leaders and minister's supporters alleged that they were not invited to the inauguration function, Panda rejected the charge and claimed that all the local leaders, including the local MLA, were invited. "Even names of local leaders were written in the plaque," Panda told reporters.
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Panda said "I have been in the party since its inception in 1997. In the first 17 years, we had a policy against hooliganism and infighting. But things have changed in the last three years.
"When some 'Babus' (officers) sitting in AC rooms have started deciding the party activities, it has become a victim of indiscipline. This is not a good sign."
Panda, who was recently removed from the post of spokesman of BJD's parliamentary party, said he had already taken up the matter of indiscipline in the party with the president. "I have raised the issue in BJD's parliamentary party meeting. I am sure once Naveen Babu gets to know the truth, he will certainly take steps," Panda told reporters.
BJD vice-president and minister S N Patro described the incident as a local problem. "It will be sorted out locally. The district president of the party, local MP and local MLA will resolve the matter."
Senior BJP leader and Union minister Dharmendra Pradhan, however, came down on the ruling BJD over the attack on the MP. "There is no democracy in the state," he said.
Congress leader Suresh Routray said such incidents would be explosive in the coming days as the government and the ruling party were functioning in an arbitrary manner.