MANILA (Reuters) - U.S. President Donald Trump said on Monday he had a  great relationship  with his Philippine counterpart, Rodrigo Duterte, while a White House official said human rights got only a brief mention when the two met on the sidelines of an Asian summit. A spokesman for Duterte said there was no mention at all of human rights or extrajudicial killings during their conversation.  The meeting between the two presidents was one of the most anticipated at the summit of East and Southeast Asian leaders in Manila, with human rights groups pressing Trump to take a tough line on Duterte over his bloody war on drugs, in which thousands of people have been killed.  The conversation focused on ISIS (Islamic State), illegal drugs, and trade,  said White House spokeswoman Sarah Sanders.  Human rights briefly came up in the context of the Philippines  fight against illegal drugs.  Duterte s spokesman, Harry Roque, told a news conference the Philippine president had explained his antidrug policy at length to Trump, who  seemed to be appreciative of his efforts.   There was no mention of human rights, no mention of extralegal killings,  he said. A joint statement released later by the White House listed human rights as the third of 14 topics discussed.  The two sides underscored that human rights and the dignity of human life are essential, and agreed to continue mainstreaming the human rights agenda in their national programs to promote the welfare of all sectors, including the most vulnerable groups,  the statement said. They discussed the Philippine campaign against crime, including illegal drugs, it said, and  committed to share best practices in the areas of prevention; enforcement, including capacity-building and transparency in investigations; and rehabilitation.   More than 3,900 people have been killed in a war on drugs that Duterte declared when he took office last year. His government says the police act in self-defense, but critics say executions are taking place with no accountability.  We are your ally. We are an important ally,  Duterte told Trump at the beginning of their talks, according to reporters allowed in to the meeting room. Trump replied:  We ve had a great relationship. This has been very successful. And the ASEAN (Association of Southeast Asian Nations) conference has been handled beautifully by the president in the Philippines.  Duterte, who has been called the  Trump of the East  for his brash style and provocative language, said last week he would tell the U.S. president to  lay off  if he were to raise accusations of rights violations. Trump was criticized in May for praising Duterte during a phone call for the  great job  he was doing to counter illegal narcotics. The United States and the Philippines, a former U.S. colony, have been strategic allies since World War Two. But their relations have been strained by anti-U.S. outbursts from Duterte and his enthusiasm for better ties with Russia and China. However, Duterte clearly appears to be getting on better with Trump than he did with the American president s predecessor, Barack Obama. Trump and Duterte seem to have warmed to each other after meeting for the first time on Saturday at an Asia-Pacific Economic Cooperation (APEC) group meeting in Vietnam. On Sunday, Duterte crooned hit Filipino love song  Ikaw  (You) at a gala dinner for summit leaders in Manila, saying it was on  the orders  of Trump. One of the song s verses, translated from Filipino, begins:  You are the light in my world, a half of this heart of mine .  Ladies and gentlemen, I sang uninvited, upon the orders of the commander in chief of the United States,  Duterte said later, according to the ABS-CBN news channel. Roque described the relationship between Trump and Duterte as  warm, friendly and candid.   It s very apparent that both of them have a person who they consider as not a best friend,  he added.   They have similar feelings toward former U.S. President Barack Obama.   Duterte s anger was unleashed last year when Obama raised concern about possible human rights abuses in the war on drugs. Duterte said Obama could  go to hell  and called him a  son of a bitch.  