SYDNEY, Australia — Australian Prime Minister John Howard on Monday condemned a day and night of race riots in Sydney’s beachside suburbs, but said he did not believe Australian society had an undercurrent of racism. Howard was speaking as police formed a strike force to track down the instigators of the running battles that involved drunken mobs of white men yelling racial slurs, young men of Lebanese descent and hundreds of police.

The fighting left 31 people injured, including police and paramedics. One was hospitalized after being stabbed in the back by a man police said was Middle eastern in appearance. There were 16 arrests. "What we have seen yesterday is something I thought I would never see in Australia, and perhaps we have not seen in Australia in any of our lifetimes, and that is a mass call to violence based on race," Community Relations Commission chairman Stepan Kerkyasharian told Sky News.Police chief Ken Moroney called the rioting among "the worst violence that I have ever seen in my policing service of 40 years."

 The neighborhoods where the rioting broke out were peaceful early Monday evening, but local media reported that mobile phone text messages were circulating calling for more violence next weekend.

 Several hundred people of Arab descent gathered later in the evening outside one of Sydney’s largest mosques to chant. Police spokesman Paul Bugden said about 300 people remained at the mosque mid-evening and were being watched by "sufficient police to prevent a breach of the peace." Bugden said it also was quiet in the suburbs hit by Sunday’s rioting.

The prime minister condemned the rioting, saying most Australians were not racist. "Attacking people on the basis of their race, their appearance, their ethnicity, is totally unacceptable and should be repudiated by all Australians irrespective of their own background and their politics," Howard said.

"But I’m not going to put a general tag [of] racism on the Australian community," he said. "I do not accept that there is underlying racism in this country."

New South Wales state political leader Morris Iemma said police would hunt down the instigators of the violence, which authorities said was fanned by neo-Nazis. "There appears to be an element of white supremacists, and they really have no place in mainstream Australian society," said Police Minister Carl Scully. "Those sort of characters belong in Berlin [in the] 1930s."

Rioting erupted Sunday after thousands of drunken white youths attacked police and people of Middle Eastern appearance at Cronulla beach, in southern Sydney. It spread later with retaliatory attacks by groups of youths of Arab appearance who stabbed one man and smashed dozens of cars.

The violence shocked the city of 4 million, which prides itself on being a largely harmonious cultural melting pot.

Sydney’s Daily Telegraph’s front page headline, over a picture of white youths attacking a man of Arab appearance on a train, read: "Our disgrace."

Keysar Trad, a prominent member of Sydney’s Lebanese community, said he had spoken to one man released from a hospital Monday after being beaten by white thugs who was urging calm in the days ahead.