British and German media obtained information, purportedly including names, telephone numbers and relatives’ details, of 22,000 members of Islamic state from 50 countries.

including 是由动词include 变来的现在分词，现代英语已把including 用作介词了。介词短语purportedly including names, telephone numbers and relatives’ details把information和of分隔开来，这算不算插入语，目前没有明确的说法。也就是说，把“分隔成分”看作“插入语”，没有这种说法。通常情况下，purportedly including names, telephone numbers and relatives’ details 应该放在句末。

例如，以下句子中红色部分把两个紧密相关的成分分隔开来，但我们不能称其为“插入语”。

He laughs best who laughs last. 谁笑到最后，谁笑得最好。

The little girl, with her mother away from home, felt very lonely. 那个女孩因母亲不在家，感到很孤独。

I found to my disappointment that all the tickets to the theatre had been sold.

She carries over the shoulder of her leather coat a heavy black purse.

Einstein was, in the eyes of a young friend, a simple, modest and ordinary man.

The discovery has made possible new techniques for brain surgery.

I have a picture here of a man who knew the address.

I cannot say that I think very highly of your discrimination.