STOCKHOLM (Reuters) - Swedish prosecutors on Friday extended American rapper A$AP Rocky\u2019s detention by six days amid their ongoing investigation into a street fight in Stockholm as U.S. President Donald Trump said he planned to intervene in the case. FILE PHOTO: A$AP Rocky performs "I'm Not the Only One" with Sam Smith (not pictured) during the 42nd American Music Awards in Los Angeles, California November 23, 2014. REUTERS\/Mario Anzuoni\/File PhotoA district court agreed to a request from prosecutors for more time for their investigation of alleged aggravated assault by the 30-year-old performer, producer and model, whose real name is Rakim Mayers. \u201cThe court decided that the artist will remain in custody until July 25 because of the flight risk,\u201d Daniel Suneson, the prosecutor in charge of the case, said in a statement. \u201cThis gives us time to complete the investigation.\u201d The artist\u2019s lawyer, Slobodan Jovicic, said the decision was expected but unfair, and that A$AP Rocky is innocent. \u201cHe (Mayers) believes he was assaulted and has acted in self-defense,\u201d Jovicic told journalists. The detention of Mayers, who attended the court dressed in a green T-shirt, has gained widespread attention including from Trump and U.S. first lady Melania Trump. More than 600,000 people have signed an online petition for his release, while fellow artists have expressed their support. \u201cSweden\u2019s a great country and they\u2019re friends of mine,\u201d Trump told reporters at an unrelated event at the White House on Friday. \u201cWe\u2019ll be talking to them. We\u2019ve already started.\u201d Trump said he did not know Mayers but that \u201cmany members of the African-American community\u201d sought his help for the rapper, who is black. U.S. Representative Adriano Espaillat of New York, where Mayers was born, has also urged his release. Mayers was detained on July 3 along with his bodyguard and two other members of his entourage in connection with a fight in a Stockholm city-center street in the early hours of June 30. The performer was in Stockholm for a concert, and has had to cancel several shows in his European tour. U.S. Assistant Secretary of State for Consular Affairs Carl Risch met with Mayers on Friday, and was due to discuss the issue with the foreign ministry and the justice department during a two-day visit to Sweden. Before his arrest, Mayers uploaded videos to his Instagram account of an altercation with two men, saying they had followed him and his entourage and that he had not wanted any trouble. The bodyguard was released without charge while a judge on July 5 extended the detention of Mayers and his two other associates. Reporting by Helena Soderpalm; Additional reporting by Ilze Filks in Stockholm and Susan Heavey and Steve Holland in Washington; Editing by Kevin Liffey and Will DunhamOur Standards:The Thomson Reuters Trust Principles.