Quoting intelligence inputs, official sources said the Myanmar Army's order was issued on May 24 -- three days before Prime Minister Manmohan Singh embarked on his visit to the neighbouring country -- and the move is considered as a goodwill gesture from Nay Pyi Taw.
There are 12 to 15 camps of Manipur based insurgent groups like PLA and PREPAK across the Indo-Myanmar border where more than 2,000 armed cadres are taking shelter, they said.
The militants often come to Manipur to carry out subversive activities and leave the state to escape action by security agencies.
The sources said if the Manipur militant groups are forced to close down their camps by the Myanmar Army, it would have significant impact on the security situation in the northeastern state.
Besides, they said, other northeastern militant groups having bases in Myanmar may also have to face the heat of the neighbouring country with improved bilateral relations between the two countries.
Prime Minister Singh will return to New Delhi today after a three-day visit to Myanmar.