Before Miri was founded, Marudi was the administrative centre of the northern region of Sarawak. Miri was founded in 1910 when the first oil well was drilled by Royal Dutch Shell. The discovery of an oil field in Miri has led to rapid development of Miri town. Miri became the administrative centre of the northern region of Sarawak by 1929. During World War II, the Miri oil fields were destroyed by the Brooke government to sabotage Japanese operations in Southeast Asia but to no avail; Miri town was the first landing point of Japanese troops in Borneo. The subsequent Japanese occupation led Miri to become a target of Allied air raids which caused the destruction of oil refinery facilities in Miri. The petroleum industry continued to be a major player in the city's economy after the war. Oil exploration has moved offshore since the 1950s, but subsequently new inland oil fields were found in 1989 and 2011. In 1974, the formation of Malaysian oil and gas company Petronas led to co-operation between Petronas and Shell on oil exploration in the Miri region. In 2005, Miri became the 10th city in Malaysia to be granted official city status, the first non-state capital city to be bestowed such status.