Terrorism is not just a threat for a country but to the entire civilization, he said.
"It is very unfortunate that people are still making the mistake of distinguishing between good terrorists and bad terrorists.
"State sponsorship of terrorism is the biggest threat the world is facing today," Modi said, in an apparent reference to Pakistan.
India in the past has blamed Pakistan for carrying out terrorist attacks in the country and asked it to stop supporting terror outfits operating from its soil.
"The water is now rising above the head," Modi said as he urged the world leaders to unite for combating the menace.
"Combating terrorism and radicalisation is the most accurate test of the leadership in the world," he said.
Modi arrived in the Maldives on Saturday on his first foreign visit after re-election as Prime Minister to strengthen the bilateral ties, reflecting the importance India attaches to its 'Neighbourhood First' policy.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)