Jakarta – One man was killed and 15 injured in a clash between supporters of rival parties campaigning for the June elections in the Indonesian city of Yogyakarta, a report said Monday.

The man, identified as Eko Prabowo, died on the way to a hospital after Sunday's clash between supporters of the Indonesian Democratic Party of Struggle (PDI-S) and the United Development Party (PPP), the Jakarta Post said.

Police were quoted by the Post as saying the combattants used crude weapons in the clash in which one person lost his ear and another had his hand chopped off.

Residents, who tried to intervene and stop the fighting, were themselves attacked, and police were outnumbered by the brawling supporters, the Post said.

The PDI-S and the PPP are among the larger of the 48 parties contesting the planned June 7 elections, the first since the fall of president Suharto, under whose rule the number of parties was confined to three.

Sporadic campaigning has started, although the official campaign period does not start until May 18.