The local police were not intimated about the raid conducted early in the morning at a place close to the Indo-Nepal border.
Following media reports about the incident, political parties and Nepal Police brass have expressed concern at such transgression.
“Incursion of Indian police in Bardia is gross violation of Nepali sovereignty,” former prime minister and senior Unified Communist Party of Nepal (Maoist) leader Baburam Bhattarai tweeted.
This is not the first instance of Indian security forces entering Nepali territory in search of criminals without informing counterparts across the border.
“The matter is under investigation. We do not condone such incidents and if these reports are found to be true, action will be taken,” stated the Indian embassy in a release.