SHANGHAI: Authorities in the city are focusing on crime prevention among children of migrant workers as part of efforts to make the streets safer.

"Juvenile criminal cases involving migrants have grown rapidly in recent years and now account for a majority of Shanghai's juvenile delinquency, posing a great challenge for local juvenile education departments and social workers," Cai Zhong, director of the Shanghai Community Juvenile Affairs Office, said at a recent press conference.

The city reported 2,625 cases of juvenile delinquency last year, an increase of 56 percent from the figures in 2004.