Scores of people are reportedly injured after clashes between supporters of Indonesia's main opposition party and backers of the ruling Golkar party in Pekalongan, Central Java.

Pekalongan is one of the few districts where the Moslem-led party won over Golkar in the last elections in 1992. The area has suffered increasing violence between supporters of the two parties since March, however the first week of campaigning for the national election has seen even more trouble.

The Jakarta Post daily says in one confrontation, about 100 supporters of the Moslem-led United Development Party, returning from a campaign rally, were attacked by a mob in front of a Golkar office.

Indonesia's 124 million voters will elect 425 members of parliament in the May 29 polls.