The security personnel belonged to the Assam Rifles, a paramilitary force of the federal government, Xinhua reports.
All the seven injured were admitted to a local hospital. They were said to be out of danger.
The local police clarified that the incident was not related to the ethnic violence which had been occurring since last year.
"This unfortunate incident should not be correlated with ongoing conflict, given the fact that none of the injured are from Manipur. Investigation into the incident has been ordered to ascertain the facts," said an official statement issued by local police.
MNA/PR