Canadian singer Justin Bieber was stopped by the immigration officials and questioned for a lengthy time at Los Angeles International Airport on Thursday.
The pop star underwent additional screening by the airport officials after his arrival from Japan.
It’s not clear why the checks was necessary or if it’s connected to Bieber’s recent legal troubles.
Bieber, whose tumultuous life has landed him in trouble more than once, on Wednesday apologised for a visit to a Tokyo shrine at the centre of a bitter international row over Japan’s wartime aggression.
Bieber, 20, posted a picture on social media of himself visiting Tokyo’s Yasukuni Shrine with the heading, “Thank you for your blessings”.
The picture was later deleted, although it was republished elsewhere on the Internet, including by a Bieber fan group, and drew criticism from South Korea and China.
The shrine honours 14 Japanese leaders convicted as war criminals after World War Two along with Japan’s war dead, and visits to the shrine by Japanese politicians anger victims of Japan’s past aggression, including South Korea and China.
Chinese officials have compared Japanese politicians’ visits to the shrine to the idea of German politicians laying flowers on Hitler’s bunker.
Bieber later said he had visited Yasukuni by mistake after spotting a beautiful shrine and asking his driver to stop, believing it was “only a place of prayer”.
“To anyone I have offended I am extremely sorry,” he wrote on his Instagram site. “I love you China and I love you Japan.”
Bieber faces a trial in Miami on charges of driving under the influence, resisting arrest and using an expired license after police say he was caught drag racing in Miami Beach.
The trial was set to begin May 5, but lawyers for Bieber argued that more time may be needed to hear potential pre-trial motions and a Miami judge on April 23 agreed to delay Bieber’s trial until July 7.
Bieber has pleaded not guilty to the charges and, if convicted, could face six months in jail.
Bieber also faces charges and lawsuits in California and Toronto stemming from alleged behavior that has driven headlines. Shortly before his Miami arrest, detectives in California raided Bieber’s home after he was accused of pelting a neighbor’s house with eggs.
In February, Bieber was charged with assaulting a limousine driver in Toronto in December.