He was caught while taking photographs around 'Temple Trees', Prime Minister Ranil Wickremesinghe's official residence, police said.
They said the suspect had told them that the photos were taken because of the beauty of the area with the decorations for the 69th Independence Day celebrations.
There was tight security this morning around the area where the celebrations were on just a stone's throw away from where the Indian was arrested.
Both Lankan President Maithripala Sirisena, PM Wickremesinghe were attending the celebrations along with the military top brass.
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