HONG KONG — The police clashed with hundreds of pro-democracy protesters in the densely populated Mong Kok neighborhood early Sunday in the second straight day of violence after demonstrators recaptured blocks of city streets from the police.

More than 100 police officers — many with shields, batons and helmets — faced off against an even greater number of demonstrators and their supporters on Nathan Road, one of Hong Kong’s busiest shopping streets. The police turned a stretch of the southbound lanes of the thoroughfare into a parking lot for their vans and buses.

Officers advanced on the barricades just after midnight. At least three people were hurt, the police said in a statement, which also said that a police officer suffered a shoulder injury. Members of a first-aid station set up by protesters said several protesters were hurt.