JAKARTA, Feb. 11 (Xinhua) -- A man carrying a sword struck a church congregation on Sunday in Yogyakarta province of Indonesia, wounding at least four people before police shot him, a police officer told Xinhua by phone.

The assault occurred during the Sunday's mass in St Lidwina Bedhog Trihanggo church of Sleman district in the province, said the police officer who is in charge of the police station in Gamping sub-district where the incident took place.

"The incident took place between 7:00 a.m. to 7: 30 a.m Jakarta time today (Sunday) in Lidwina church," he said.

The attack injured at least four people, including a police officer who tried to help the priest against the attack, according to police.

All the injured people have been rushed into a nearby hospital for medical treatments, police said.

Police are investigating the case, trying to find out the motive of the strike and the network linked with the man.

Churches have been commonly targeted by militants in Indonesia.