As Prime Minister Narendra Modi embarked on a visit to Brunei and Singapore, the Congress took a swipe at him on Tuesday, asking when will "our frequent flyer" make a 'humanitarian' visit to the troubled state of Manipur. Prime Minister Modi is visiting Brunei on September 3-4 at the invitation of Sultan Haji Hassanal Bolkiah to further strengthen bilateral cooperation in all existing sectors. He is slated to visit Singapore on September 4-5 at the invitation of his Singaporean counterpart Lawrence Wong. Congress general secretary in-charge communications Jairam Ramesh said, "The non-biological PM is making what is being billed as a 'historic' visit to Brunei, after which he goes to Singapore. When is our frequent flyer going to make a 'humanitarian' visit to the troubled state of Manipur?" The situation in Manipur continues to be very tense, despite claims to the contrary being made by Manipur Chief Minister N Biren Singh, he said. "Today is exactly 16 months since the eruption o