The pacts covered cooperation in many fields, including investment, taxation, maritime transport, labour, and education
Police raided the hotel - Jamuna Guest House - around 7:30pm on Sunday following a tip-off that militants were staying there, Cox's Bazar Additional Superintendent of Police Md Ashfarujul Haque Tutul said.
The six have been identified as Nurul Amin, Mohammad Yasin, and Abdul Aziz from Rohingya refugee camp at Kutupalong, and Noor Hossain, Mohammad Ilias and Dil Mohammad.
The additional SP said Aziz works in a madrasa outside the camp.
He added that details about them would be revealed at a media conference on Monday after interrogating them.