A police officer has been killed in an attack on a police outpost on Indonesia's Sumatra Island Wednesday.

Five men in a van drove up to the front gate of the outpost of the city of Riau and immediately jumped out and began attacking police with a samurai sword.

Four of the men were shot and killed by police, while the fifth suspect was caught as he tried to escape the scene. At least one journalist who was at the outpost to cover a scheduled event was injured.

Wednesday's attack happened two days after a family of six suicide bombers, including teens and children, targeted three churches, killing at least 13 people and wounding 41 others in Surabaya, Indonesia's second largest city. A day later, a family of five carried out a suicide bombing attack on a police headquarters in Surabaya that left 10 people wounded, including four policemen and six civilians.

Islamic State has claimed responsibility for both attacks.

The string of attacks comes as Indonesia, the world's most populous Muslim country, welcomes the first day of Ramadhan.

印度尼西亚苏门答腊岛上的一个警察站星期三受到袭击，一名警察丧生。

5名男子乘坐一辆汽车来到廖内前门的警察站，随即跳下汽车开始用大砍刀袭击警察。

4名男子被警察击毙，另外一名嫌疑人试图逃跑时被警察抓获。至少一名在警察站采访原定活动的记者受伤。

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