据 + Source + 称
称 (chēng) is a verb meaning 'to state,' 'to claim,' or 'to say.' It is commonly used in news and formal writing to attribute statements to a source, similar to English 'according to' constructions, as in 据警方称 (according to police).
据报道称,事故原因正在调查中。
jù bàodào chēng, shìgù yuányīn zhèngzài diàochá zhōng.
According to reports, the cause of the accident is under investigation.
他称自己当时不在现场。
tā chēng zìjǐ dāngshí bù zài xiànchǎng.
He claimed that he was not at the scene at the time.
警方称嫌疑人已经被抓获。
jǐngfāng chēng xiányírén yǐjīng bèi zhuāhuò.
Police say the suspect has been arrested.