Bangladesh has said it will not start sending back Rohinga Muslim refugees from January 23 as agreed earlier with Myanmar.
Sources also told the tabloid that the refugees were "forced to relive their nightmares" when they were asked to participate in "horrific scenes".
"There are many things remaining", he told Reuters by phone.
Tensions mounted at refugee camps in Bangladesh holding hundreds of thousands of Rohingya Muslims over an operation to send them back to Myanmar, from where they have fled following a military crackdown.
A Bangladesh Border Guard official said it could be months before the transfers begin.
While the two countries have signed an agreement to begin sending people home in "safety, security and dignity", the process has been chaotic and opaque, leaving worldwide aid workers and many Rohingya afraid they would be coerced into going back to villages that they fled only months ago.
Over 655,500 Muslim Rohingya fled to Bangladesh after the Myanmar military cracked down in the northern part of Rakhine state in response to militant attacks on security forces on Aug 25.
Statistics provided by the United Nations High Commission for Refugees last November showed that there are now more than 60,000 Rohingya refugees in Malaysia.
"In order for the repatriation to be right, sustainable, actually viable, you need to really to address a number of issues that for the time being we have heard nothing about, including the citizenship issue, the rights of the Rohingya in Rakhine state, meaning freedom of movement, access to services, to livelihoods", Filippo Grandi told Reuters.
Grandi said it was especially important to set up a monitoring mechanism in northern Rakhine for the returning people, reports Reuters.
Since August 2017, almost 650,000 Rohingya have fled a military operation in Myanmar's westernmost Rakhine state described by the United Nations and U.S. as "ethnic cleansing". "The Arakanese community doesn't want them back as they believe that problems will flare again if they come back", he said.
The Rohingya have always been denied citizenship by Myanmar, where many in the Buddhist majority regard them as interlopers from Bangladesh. "We are ready to accept them once they come back", Ko Ko Naing, director general of Myanmar's Ministry of Social Welfare, Relief and Resettlement, said.
Also Monday, former New Mexico Gov. Bill Richardson met with Myanmar leader Aung San Suu Kyi to discuss the refugee situation and to urge the release two detained Myanmar journalists who had been covering the crisis.
Meanwhile, Myanmar government spokesperson Zaw Htay maintained that Bangladesh had failed to provide the returnees' names and documents, and that his country was ready to both repatriate the refugees and provide security for them.
Rashedul Hasan, a spokesman for the Bangladesh army, said he was not aware of army men threatening to take away food cards. These centres are managed by the Bangladesh army.
Bangladesh's decision comes at a time when several Rohingyas in refugee camps have opposed the deal between the two countries, saying Myanmar has not promised them enough security.
"This is out of the question. But this is not going to be an easy task to send them back as they are reluctant", the official in the border district of Cox's Bazaar told Reuters.