President Maithripala Sirisena is to receive an advanced copy of the UNHRC war crimes report early this week, informed diplomatic sources said.
This will also coincide with the arrival of US Assistant State Secretary for South and Central Asian Affairs Nisha Biswal.
Biswal, during her brief stay in Sri Lanka, is expected to hold discussions with high profile government authorities including former Foreign Minister Mangala Samaraweera.
The US is a key stakeholder of the UNHRC inquiry into alleged war crimes during the final phase of war in Sri Lanka.
Although the UNHRC report was scheduled to be presented at the last session in March, the Sri Lankan government managed to delay it by six months through diplomatic manoeuvres.