Jakarta – More than 30 people have been arrested since riots broke out in central Java early this week, the official Antara news agency reported Saturday.

About 60 shops were burned or vandalized, a bank office was damaged and two truckloads of garments were set on fire in riots Monday and Tuesday in the town of Pekalongan, a military spokesman told Antara.

Eight people, including several security officers, were hospitalized.

The riots erupted after organizers of a concert sponsored by the governing Golkar party pulled down the flags of two other political parties, the Muslim United Development Party, or PPP, and the Indonesia Democratic Party, or PDI.

Lieutenant Colonel Sugeng Suryanto, spokesman of the Central Java military command, was quoted by Antara as saying authorities were looking for five more suspects.