Secretary of State Rex Tillerson spoke on Thursday with Myanmar's army chief by phone and expressed concern over reported atrocities against Muslims in Rakhine state, the US State Department said in a statement.
Tillerson urged the army chief, Senior General Min Aung Hlaing, allowing safe return of those displaced in the crisis, especially the ethnic Rohingyas, according to the 1992 Joint Statement with Bangladesh and 'without further conditions'.
More than 600,000 Rohingya Muslims have fled the Rakhine state in Buddhist-majority Myanmar since security forces responded to Rohingya militants' attacks on Aug 25 by launching a crackdown.
Bangladesh initially kept its border closed after violence broke out in the western Myanmar state, but later opened it to Rohingyas on humanitarian grounds.
Bangladesh was already home to 400,000 Rohingya refugees over the last few decades before the latest colossal exodus.
In 1992, Bangladesh signed a repatriation agreement with the then military regime of Myanmar, following which 236,599 Rohingyas returned to their homeland. But another 2,415 were denied entry even after meeting the criteria under the arrangement.
Earlier this month, Bangladesh Foreign Minister AH Mahmood Ali said the previous arrangement will not work now as the current situation is 'entirely different' and verifying Rohingyas based on their residence in Rakhine is not 'realistic' anymore.
He had also said Bangladesh finds Myanmar’s proposal to take back the Rohingyas in line with the 1992 arrangement as a 'strategy to defuse international pressure'.
His remarks came a week after the Oct 2 Dhaka meeting with a Myanmar delegation, led by its Minister for the Office of the State Counsellor Kyaw Tint Swe, when the formation of a joint panel was agreed for repatriating refugees.
During the talks, Dhaka proposed signing a new bilateral agreement for the repatriation process and handed over a draft to Myanmar.
A Bangladesh delegation led by Home Minister Asaduzzaman Khan went to Myanmar this week in an effort to take forward the discussion on the repatriation of refugees.
Both sides also agreed to form the joint working committee in November to arrange resettlement.
In his phone call on Thursday, Secretary Tillerson urged the Myanmar general to support the government in ending the violence and allowing the safe return of ethnic Rohingyas.