Nepali Maoists have infiltrated into India with the locals spotting such cadres in Orissa's Malkangari district bordering Chhatisgarh where 53 securitymen and two civilians were killed in the last three weeks.
"We have received information about infiltration by Nepali maoists, but nothing can be confirmed unless they are nabbed," a senior intelligence officer said, adding that Nepal sometime ago had indicated to India that a section of maoists could cross over.
While 38 personnel, including 36 commandos of the elite Greyhound Force of Andhra Pradesh, were killed while sailing through the Balimela reservoir on June 29, 17 other Orissa police personnel died in a landmine blast triggered by suspected ultras on July 16.
"Though Malkangiri is identified as the hot-bed of maoist activities, never before such a large number of people have been killed by ultras," Director General of Police Gopal Chandra Nanda said.
Worried over the increase in maoist violence in Malkangiri district where 86 persons have been killed so far this year, Chief Minister Naveen Patnaik has asked the DGP to make a detailed report on the reason behind the incidents.
Though the Orissa police were yet to find the reason behind the sudden rise in Maoist violence in the state, two to three rebels from Nepal were spotted by locals in Malkangiri.
Nanda told PTI that he had no knowledge about the presence of Nepali maoists in Orissa.
Nepalese maoist leader Prachanda's decision to embrace democracy had enraged many cadres in the Himalayan nation who could have infiltrated into Orissa and other states, the sources said.
With the maoist movement aiming at establishing a red corridor from Pashupatinath in Nepal to Tirupati in Andhra Pradesh, the cadres could have jumped the boundary after Prachanda gained power in the Himalayan state, they felt.
Officers engaged in anti-maoist operation were of the view that maoists in India used to get moral as well as logistic support from their counterparts for long.
The existence of Nepali maoists in Orissa was evident from the recovery of at least six CDs from Mandrabaju area of Gajapati district some time ago.
"The recovery of Nepali language CDs could be an indication to establish links between maoists here and in Nepal," said Gajapti district SP S N Sinha.
This apart, a suspected maoist identified as Sanjay Thappa was seen on the Orissa-Jharkhand border nearly two years ago.
South-Western Range Deputy Inspector General (DIG) Sanjeev Panda who oversaw anti-maoist operations in Malkangiri, Koraput and some other sensitive districts, suspected the hand of maoists trained outside India behind both the incidents at Balimela and MV-126.
"One needs to be highly skilled to trigger landmines containing a huge quantity of explosives as was done in MV-126," Panda said.
The intensity of explosion was so strong that an anti-landmine vehicle got damaged completely.