Bangladesh Premier Sheikh Hasina was accorded a warm welcome upon her arrival at the Government House, the Thai premier's office
Oscar Morel, 36, is facing murder and weapons charges.
Imam Maulana Akonjee, 55, and Thara Uddin, 64, were gunned down in the Ozone Park neighborhood of Queens on Aug 13 in an attack that shook the area's predominantly Bangladeshi community.
Authorities have not yet publicly identified a possible motive for the attack.
Morel's lawyer, Michael Schwed, did not immediately respond to a request for comment on Thursday.
Morel, who is being held without bail, is due back in Queens state court on Oct 18.
Akonjee, a father of seven, emigrated from Bangladesh several years ago and was described by community members as a humble and deeply religious man.